grade 9 - science- complete

7/25/2019 Grade 9 - Science- Complete

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June Monthly Examination in Science 9- Chemistry

I. Identification. Direction: Choose the appropriate term to complete each sentence below.

1. The study of matter and changes that it undergoes.

2. Energy cannot be created or destroyed.3. Smallest particle of a compound.

4. Stored energy that remains aailable until we choose to use it.

!. " method of inestigation inoling e#perimentation and obseration to ac$ire new %nowledge& sole problems

and answer $uestions.

'. Energy associated with motion.

(. The most famous of the )ree% philosophers.

*. The scientist discoered that patterns and regularities e#isted in their obserations of gas behaiors.

+. The people who search for ways to change cheap metals into gold.

1,. Consist of isibly different substances.

11. State that the ration by mass of the elements in the compound is always the same& regardless of the source

compound.

12. "lchemist e#perimented with many different %inds of chemicals& searching for what they termed the----------.13. Chemistry comes from the gree% word -------------.

14. " controlled method of testing a hypothesis under the conditions at a time and place of choosing.

1!. " substance that are made up of more than one type of atom.

Modified true or false. Direction: rite TRE if the statement is true and rite !"#SEif the statement is false then

C$"%&Ethe underline word for the statement become correct. /2 pts. each0

1. The father of odern chemistry is obert oyle.

2. The father of chemistry is "nton aoisier.

3. "lchemists began loo%ing for ways to transform common metals& such as lead& copper& and iron& into

gold.

4. " Theory is an e#planation that summari5es a hypothesis or a set of hypothesis and has been supportedwith repeating testing.

!. " Scientific method is a statement that summari5es the results of many obserations and e#periments.

'. "n Element is a substance that cannot be bro%en down into smaller substances by chemical method.

(. " Compound is substance containing two or more elements chemically 6oined together.

*. " i#ture consists of two or more substances that are not chemically 6oined together.

+. " 7otential energy is energy associated with motion.

1,. aw of conseration of energy stated that the total amount of mass and energy in the unierse is consere.

II. Essay

Direction: "nswer the $uestion briefly. /! pts. Each0

1. hat was the origin of the word 8Chemistry9:

2. ;ow is energy used:

3. State the law of conseration of energy.

- Chemistry - Philosophers stone- Compounds - Heterogeneous mixture- Chemeia - Alchemists- Scientifc method - Molecule- Kinetic energy - Socrates, Plato and Aristotle- La o! constant composition - "xperiment- #ac$ues Charles - Potential energy- La o! conser%ation o! energy


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July Monthly Examination in Science 9- Chemistry

I Matchin' ty(e: Direction: atch each definition with the correct term.

Definition Term

) It uses circles or lines to represent ". leel ?. @alence electrontype. ). "ufbau priciple

, " number used when describing the ;. Core electron

Energy leel aailable to atoms and I. "ngular momentum


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1 =raw the ewis dot diagram for ithium.

2 =raw the ewis dot diagram for calcium.

3 =raw the ewis dot diagram for bromine.

4 =raw the ewis dot diagram of selenium.

! =raw the ewis dot diagram of o#ygen.

gB/ (. "lCl30 *. "l2B3+ a?21, 1,. i2B

I2. Definition

Direction: =efine the ?ollowing term briefly. /! pts. each0

1. =efine an Ion.

2. =efine polyatomic Ions.

)st6uarterly Examination in Science 9 7 Chemistry

I Identification. Direction: Identify the appropriate term.

- Scientific aw > 7hysical change- Chemical potential energy > aw of constant composition- Chemical properties > ;ypothesis- ;omogeneous mi#tures > "ntoine aosier - obert oyle > Theory- Element > Chemical Change- or% > 7hysical change- Controlled e#periment


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1. The father of chemistry.

2. Can only be obsered when a substance is changed into a new substance.

3. Changes that occurs when one substance is turned into another substance.

4. The father of odern chemistry.

!. Energy stored in the atoms& molecules& and chemical bonds that ma%e up matter.

'. Bne that compares the results of an e#perimental sample to a control sample.(. "n e#planation that summari5es a hypothesis or a set of hypothesis and has been supported

with repeating testing.*. eferred to as solution.

+. ?orce applied oer a distance.1,. " substance that is made up of only one type of atom.

11. " statement that summari5es the result of many obseration and e#periments.

12. Changes that do not alter the identity of a substance.

13. 7roperties that can be obsered without changing the identity of the substance.

14. " suggested solution.

1!. States that the ratio by mass or the elements in the compound is always the same&

regardless of the source of the compound.

II. Modified true or false Direction: rite TRE if the statement is true and rite !"#SEif the statement is

false then C$"%&Ethe underline word for the statement become correct. /2 pts. each0

1. The word 8al>%imia9 meaning 8the art of transformation9

2. Chemistry is the scientific study of matter and the changes that it undergoes.

3. Scientific law is a method of inestigation inoling e#perimentation and obseration to "c$uire new %nowledge& sole problem& and answers $uestion.

4. "n e#periment is a not controlled method of testing a hypothesis under the conditions

e want at a time and place of our choosing.

!. " controlled e#periment is one that compares the results of an e#perimental sample to a

control sample.

'. " molecule is the smallest unit of an element haing the properties of that element.

(. " inetic energy is a stored energy that remains aailable until we choose to use it.

*. here there is wor% there is force+. The fundamental law of conseration of energy is energy cannot be created but destroyed.

1,. " molecule is a group of two or more particles chemically 6oined together.

III. Electron 8ritals. Direction: =raw orbital diagrams for the following atoms

1. ?

2.

3.

4. B

!. S

'. Cl

(. "l

*. 7+. De

1,. ;

Direction: =raw ewis dot diagrams for the following atoms.

1. B#ygen 4. Carbon (. eryllium 1,. oron


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2. 7hosphorus !. agnesium *. ;ydrogen

3. ;elium '. 7otassium +. "luminum

I2. Ionic Com(ound and 5ritin' formulas. Direction:rite chemical formulas for the compounds in each bo#. The

names are found by finding the intersection between the cations and anions. E#ample The first bo# is the intersection

between the 85inc9 cation and the 8chloride9 anion& so you should write 8FnCl29& as shown. * (ts.;


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----- 1. If two coalently bonded atoms moe closer than a distance of the bond length& the potential energy of the atoms

". ecomes negatie C. Increase

. =ecreases =. emains constant

----- 2. The electrons inoled in the formation of a coalent bond are

". Transferred from one atom to another

. ?ound only in the s orbitalsC. @alence electrons

=. In filled orbitals

----- 3. ond energy is the energy

". "bsorbed as a molecule forms.

. Change as atoms get closer together.

C. e$uired to brea% a chemical bond and form separate& neutral atoms.

=. Bf two coalently bonded atoms.

----- 4. ond length between two bonded atoms is

". twice the diameter of the molecular orbital.

. the separation at which their potential energy is minimum.

C. the separation at which the motion of each atom stops.

=. the sum of the diameters of each of the two oerlapping electron clouds.----- !. hich compound most li%ely has the greatest bond energy:

a. ;?H ;? bond length +2 pm C. Cl2H ClCl bond length 1++ pm

b. I2H II bond length 2'' pm =. ;ClH ;Cl bond length 12( pm

----- '. The ewis structure of which of the following compounds does not follow the octet rule:

". D;3 C. CCl4. ?3 =. ;2B

----- (. In a double coalent bond&

". Bne atom has more than eight alence electrons.

. Bne atom loses a pair of electrons.

C. Two atoms share eight alence electrons.

=. Two atoms share two pairs of electrons.

----- *. hich of the following is not a resonance structure of SB3:

----- +. ;ow many double bonds are in the ewis structure for hydrogen fluoride& ;?:". Done C. Two

. Bne =. Three

----- 1,. To draw a ewis structure& it is not necessary to %now

". The length of the bonds.

. The types of atoms in the molecule.

C. The number of alence electrons for each atom.

=. The number of atoms in the molecule.

----- 11. @SE7 theory". predicts the shape of some molecules.

. is limited to polar molecules.

C. assumes that pairs of alence electrons surrounding an atom repel each other.

=. oth /a0 and /c0----- 12. The shape of molecules that contain only two atoms is

". inear C. Trigonal planar

. ent =. Either /a0 or /b0

----- 13. "ccording to @SE7 theory& which molecule has a bent shape:

". CB2 C. CS2. ;2B =. ;?

-----1 4. @SE7 theory predicts that the shape of carbon tetrachloride& CCl4& is

". inear C. Trigonal planar


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. ent =. Tetrahedral

----- 1!. hich of the following molecules is polar:

". C2;2 C. ?3. ;2B =. CB2

----- 1'. The structure of which of the following compounds suggests that it has the highest boiling point:

". C;4 C. DaCl. CB2 =. B2

----- 1(. The @SE7 formula for a molecule of type "2E2 tells you that the molecule is made up of

". a central atom "& with two atoms and two E atoms bonded to it.

. a central atom "& with two atoms bonded to it and two unshared electron pairs.

C. a central atom "& with two atoms bonded to it by two bonding electron pairs.

=. two central atoms & with an atom " and two atoms E bonded to it.

-----1 *. Brbitals of e$ual energy produced by the combination of two or more orbitals on the same atom are called

". onding orbitals C. ;ybrid orbitals

. @alence orbitals =. ;igh>energy orbitals

-----1 +. The effects of hydrogen bonding will cause which compound to hae the highest boiling point:

a. ;2B C. ;2S

b. 7;3 =. ;Cl----- 2,. hich are the intermolecular forces that can act between non>polar molecules:

". Coalent bonds C. ;ydrogen bonds

. ;ybridi5ation =. ondon dispersion forces

Co=alent formulas and %omenclature

Direction:rite the formulas for the following coalent compounds

10 Ditrogen tribromide ----------------------------------

20 ;e#aboron monosilicide ----------------------------------

30 Chlorine dio#ide ----------------------------------

40 ;ydrogen monoiodide ----------------------------------!0 Iodine pentafluoride ----------------------------------

II. rite the names for the following coalent compounds

'0 74S!----------------------------------

(0 B2----------------------------------*0 S?'----------------------------------

+0 Si2r'----------------------------------

1,0 SCl4---------------------------------

III. #e5is dot structure of co=alent ond.

Direction: =raw the ewis dot structures for each of the following coalent molecules. /2 pts.0

). ;2B 2. Si?4 3. C?2Cl24. CCl4 !. C2;'

I2. Enumeration:

Direction: Enumerate the following.

rite the ! steps on performing ewis dot structure of an element.

ules in naming binary coalent compounds /! pts.0

*nd6uarterly Examination in Science 9 7 Chemistry

I. >ritin' and %amin' Co=alent !ormulas and %omenclature

I. Direction: rite the formulas for the following coalent compounds

10 Ditrogen tribromide -------------------------------------


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20 ;e#aboron monosilicide ----------------------------------

30 Chlorine dio#ide ---------------------------------------

40 ;ydrogen monoiodide ----------------------------------

!0 Iodine pentafluoride -----------------------------------

'0 =initrogen trio#ide ------------------------------------

(0 Ditrogen trihydride /ammonia0---------------------------* 7hosphorus triiodide ----------------------------------

+0 =ihydrogen mono#ide ---------------------------------

1,0 =iphosphorous pento#ide ------------------------------

II. Direction:rite the names for the following coalent compounds

110 74S!----------------------------------

120 B2-----------------------------------

130 S?'----------------------------------

140 Si2r'--------------------------------

1!0 SCl4----------------------------------

1'0 C;4----------------------------------

1(0 2Si ----------------------------------1* D?3----------------------------------

1+ ;2B -----------------------------------

2, D2B!----------------------------------

II. Identification and Com(letion ty(e. Direction: Complete the table below. /2, pts.0

!ormula #e5is dot structure Electron &eometry Molecular &eometry

1 CCl42 7;33 ;2Co

4 ;2B2

! C2;4

Direction: Jse different color of ballpen to circle the common atoms or compounds in each e$uation to help you

determine the type of reaction it illustrates. Jse the code below to classify each reaction.

S Synthesis = =ecomposition S Single eplacement = =ouble eplacement

1. ------ 7 K B2 L 74B1, '. ------ g K B2 L gB

2. ------ ;gB L ;g K B2 (. ------ "l2B3 L "l K B2

3. ------ Cl2 K Dar L DaCl K r2 *. ------ ;2 K D2 L D;34. ------ Da K r2 L Dar +. ------ CuCl2 K ;2S L CuS K ;Cl

!. ------ ;gB K Cl2 L ;gCl K B2 1,. ------ C K ;2 L C;4


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Direction: alance the following e$uation.

10 ---- Da37B4K ---- B;---- DaB; K ---- 37B420 ---- g?2K ---- i2CB3---- gCB3K ---- i?

30 ---- 74K ---- B2---- 72B3

40 ---- bDB3K ---- e?2---- e/DB302K ---- b?!0 ---- "gDB3K ---- Cu---- Cu/DB302K ---- "g

'0 ---- C?4K ---- r2---- Cr4K ---- ?2(0 ---- ;CD K ---- CuSB4---- ;2SB4K ---- Cu/CD02*0 ---- )a?3K ---- Cs---- Cs? K ---- )a

+0 ---- aS K ---- 7t?2---- a?2K ---- 7tS

1,0 ---- D2K ---- ;2---- D;3110 ---- Da? K ---- r 2---- Dar K ---- ?2120 ---- 7b/B;02K ---- ;Cl---- ;2B K ---- 7bCl2130 ---- "lr 3K ---- 2SB4---- r K ---- "l2/SB403140 ---- C;4K ---- B2---- CB2K ---- ;2B

1!0 ---- Da37B4K ---- CaCl2---- DaCl K ---- Ca3/7B4021'0 ---- K ---- Cl2---- Cl

1(0 ---- "l K ---- ;Cl---- ;2K ---- "lCl31*0 ---- D2K ---- ?2---- D?31+0 ---- SB2K ---- i2Se---- SSe2K ---- i2B

2,0 ---- D;3K ---- ;2SB4---- /D;402SB4

III. >ord ?rolem

Direction: rite the word e$uation for each of the following chemical reactions& @"#"%CE them if necessary&

and include the type of reaction. /2pts. Each0

1. hen isopropanol /C3;*B0 burns in o#ygen /B20& carbon dio#ide& water& and heat are produced.

2. hen dissoled beryllium chloride reacts with dissoled siler nitrate in water& a$ueous beryllium nitrate and

siler chloride powder are made.

3. hen dissoled sodium hydro#ide reacts with sulfuric acid /;2SB40& a$ueous sodium sulfate& water and heat

are formed.

4. hen fluorine gas is put into contact with calcium metal at high temperatures& calcium fluoride powder is

created in an e#othermic reaction.

!. hen Sodium metal reacts with iron /II0 chloride& iron metal and sodium chloride are formed.

Direction: Identify each of the e$uation below as synthesis& decomposition& single replacement& or double

replacement.

1. ;gB ;g K B2 ---------------------

2. DaCl K "gDB3 DaDB3 K "gCl ---------------------

3. g K ;Cl gCl2K ;2 ---------------------

4. Fn K ;2SB4 FnSB4K ;2 ---------------------

!. DaB; K ;Cl DaCl K ;2B --------------------- '. "l2/SB403K Ca/B;02 "l/B;03K CaSB4 ---------------------

(. ;2K B2 ;2B ---------------------

*. Cl2K Dar DaCl K r2 ---------------------

+. Fn K CuSB4 FnSB4K Cu ---------------------

1,. ClB3 Cl K B2 ---------------------


10/21

Doember onthly E#amination in Science + M Chemistry

Multi(le choice. Direction: Circle the letter of the correct choice.

1 Earth is similar to the other inner planets in the solar system in its

". Si5e C. Composition. Shape =. "ll of the aboe

2 hen a ship sails away from shore& people watching from shore see the bottom of the ship disappear first. This is

because the

". "tmosphere obscures it C. 7lanet is rotating on its a#is

. Surface of Earth is cured =. Ship sin%s deeper into water

3 EarthNs magnetic field resembles the magnetic field of a

". ar magnet C. ;orseshoe magnet

. Spherical magnet =. Done of the aboe

4 EarthNs magnetic field

". E#tends far out into space

. Shields the planet from solar radiation

C. Is small in comparison with the si5e of Earth.=. two of the aboe

! Earth is farthest from the sun during

". Summer in the Dorthern ;emisphere

. inter in the Dorthern ;emisphere

C. Summer in the Southern ;emisphere

=. =ifferent seasons from year to year

' "reas on the moon called aria.

". are seas of water C. ?ormed a million years ago

. consist of basaltic laa =. Two of the aboe

( The surface of the moon includes

". Craters C. 7olar ice caps

. ountains =. Two of the aboe* The moonNs core.

". Is relatiely small C. Consist mostly of nic%el

. Contains ery little iron =. Is composed of igneous roc%

+ The mantle of the moon

". Is composed of two layers C. Contains the mineral oliine

. ay hae high leels of iron =. "ll of the aboe1, The moonNs crust is rich in the elements

". Silicon C. agnesium

. B#ygen =. "ll of the aboe

11 ost of the atoms of the sun e#ist as

". Solids C. )ases

. i$uids =. 7lasma12 ost of the solar system is powered by energy that originates in the sunNs

". Core C. 7hotosphere

. Corona =. Chromosphere

13 Energy traels through the radioactie 5one of the sun as particles called

". 7hotons C. 7lasmas

. 7rotons =. Done of the aboe

14 hich of the following statements about sunspots is false:". They usually occur in pairs C. They disrupt heat transfer in the sun

. They repeat in 11>year cycles =. They are storms on the sunNs surface

1! Solar flares occur when---------------.

". There is a brea% in a loop of the sunNs magnetic field.. Solar wind causes fires to flare up on the sunNs surface.

C. Duclear reactions ta%e place in the sunNs atmosphere.

=. atter inside the sun changes to the plasma state.

1' Interactions between the sun& moon& and Earth include----------.

". unar and solar eclipses C. EarthNs tides

. 7hases of the moon =. "ll of the aboe


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1( The ecliptic is the--------------.

". 7lane in which Earth orbits the sun.

. =istance between the moon and Earth.

C. 7eriod during which an eclipse occurs.

=. =ifference in si5e between the umbra and penumbra.

1* " total solar eclipse occurs when". EarthNs umbra falls on the moon.

. EarthNs shadow completely bloc%s the moon.

C. The moonNs shadow completely bloc%s the sun.

=. none of the aboe

1+ " solar eclipse usually lasts for

". " few minutes C. " few hours

. "t least an hour =. " day or more

2, The moon passes through all of its phases about once eery

". ee% C. onth

. 2 wee%s =. 2 months

True or !alse. Direction: rite T if the statement is TRE and ? if is !"#SE.

----- 1. The cone>shaped part of the moonNs shadow is the penumbra.

----- 2. The sun ma%es up oer ++ percent of the mass of the solar system.

----- 3. " total of si# spaceships hae landed on the moon.

----- 4. Earth is the only planet in the solar system %nown to hae li$uid water.

----- !. The sunNs core is made of solid roc%.

----- '. There are no current plans for returning to the moon.

----- (. "ll ob6ects in the solar system hae graitational attraction to each other.

----- *. ight is only partly bloc%ed in the umbra part of a shadow.

----- +. Solar eclipses are rare eents.

----- 1,. The moonNs graity is about half as strong as EarthNs graity.

----- 11. If you loo% at Earth from the Dorth 7ole& the planet spins in a cloc%wise direction----- 12. The sun has no atmosphere.

----- 13. =uring a partial lunar eclipse& only part of the moon enters EarthNs umbra.

----- 14. The sunNs energy comes from reactions in which hydrogen changes to helium.

----- 1!. It ta%es the moon the same amount of time to ma%e one rotation as it does to ma%e one reolution.

----- 1'. The moon appears to rise in the east because Earth rotates from east to west.

----- 1(. Energy traels through the radiatie 5one of the sun at the speed of light.----- 1*. " total lunar eclipse occurs once eery month.

----- 1+. The far side of the moon has been seen only from spacecraft.

----- 2,. Earth tilts about 3 degrees on its a#is.

Essay. Direction: "nswer the following $uestion briefly. /! pts. each0

1. E#plain how EarthNs motions cause cycles of day and night and also the seasons.

2. The last astronaut to wal% on the moon did so more than 4, years ago. If you were to trael to the moon& you

could still see the astronautsN footprints. E#plain why.


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3rdyear cycles =. They are storms on the sunNs surface

1+. Solar flares occurs when--------------------.

". there is a brea% in a loop of the sunNs magnetic field

. solar wind causes fires to flare up on the sunNs surface

C. nuclear reactions ta%e place in the sunNs atmosphere

=. matter inside the sun changes to the plasma state


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2,. The hottest part of the sun is the

". Conection 5one C. Core

. adioactie 5one =. Corona

21. 7ower grids and communication systems on Earth may be disturbed by a

". Sunspot C. Solar corona

. Solar flare =. Solar fusion reaction22. Interactions between the sun& moon& and Earth include---------------------.

". unar and solar eclipses C. EarthNs tides

. 7hases of the moon =. "ll of the aboe

23. The ecliptic is the---------------------.

". 7lane in which Earth orbits the sun

. =istance between the moon and Earth

C. 7eriod during which an eclipse occurs

=. =ifference in si5e between the umbra and penumbra

24. " total solar eclipse occurs when----------------.

". EarthNs umbra falls on the moon

. EarthNs shadow completely bloc%s the moon

C. the moonNs shadow completely bloc%s the sun=. none of the aboe

2!. " solar eclipse usually lasts for----------------------.

". " few minutes C. " few hours

. "t least an hour =. " day or more

2'. The moon passes through all of its phases about once eery--------------.

". ee% C. onth

. 2 wee%s =. 2 months

2(. ;ow much time goes by between the new moon and first $uarter moon phases:

". 1 wee% C. 3 wee%s

. 2 wee%s =. 4 wee%s

2*. hich phase of the moon occurs ne#t after the full moon phase:

". Third $uarter moon C. )ibbous moon. Crescent moon =. Dew moon

2+. Bur solar system includes--------------------.

". )ala#ies C. lac% holes

. "steroids =. Constellation

3,. The early Earth>centered model of the unierse was proposed by--------------.

". )alileo C. Copernicus. 7tolemy =. Done of the aboe

31. The planet that is most similar to Earth in mass and diameter is-------------.

". ars C. Aupiter

. @enus =. ercury

32. hich statement is true about the inner planets of our solar system:

". They formed before the sun formed C. They include ars and Aupiter. They formed from dense elements =. They hae ery long years

33. "ll planets of our solar system orbit the sun--------------.

". In the same plane C. In the same direction

. "t the same speed =. Two of the aboe

34. ;ow long the day lasts on a planet depends on its--------------------.

". =istance from the sun C. Speed of rotation

. Speed of reolution =. ength of orbit

3!. To be a planet& an ob6ect must------------------.". e big enough that its own graity ma%es it round

. ;ae cleared its path of smaller ob6ects

C. Brbit a star

=. all of the aboe

True or !alse. Direction: rite true if the statement is true or false if the statement is false.

----- 1. ight traels faster than anything else in the unierse.

----- 2. The first roc%ets eer used were launched in the 2,th century.

----- 3. The first space station was put into orbit by the Jnited States.


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----- 4. It ta%es 1 light>year for light from the sun to reach Earth.

----- !. The first li$uid>fuel roc%ets to be built were designed by obert )oddard.

----- '. S%ylab studied the effects on humans of liing in space.

----- (. hen we loo% at stars& we are seeing bac% in time.

----- *. ernher on raun 6oined D"S" and helped design roc%ets for space trael.

----- +. The ISS was constructed piece by piece oer time.

----- 1,. @isible light ma%es up most of the electromagnetic spectrum.

----- 11. The first satellite eer to orbit Earth was put into space by the Jnited States.

----- 12. The Soiets put a total of three Salyut space stations into orbit.

----- 13. E waes with longer waelengths hae higher fre$uencies.

----- 14. The scientist who first e#plained how satellites stay in orbit was ;ermann Bberth.

----- 1!. Early space e#ploration was drien by competition between the J.S. and J.S.S.. during the cold war.

Identification. Direction: Identify the appropriate term.

----- 1. ?irst space station eer put into orbit.

----- 2. "ny ob6ect that orbits a larger ob6ect.

----- 3. Energy that is transmitted across space as waes.

----- 4. Space station that is a 6oint pro6ect of the J.S. and seeral other nations.

----- !. Dame of the force that pushes a roc%et forward.

----- '. =eice that uses both mirrors and lenses to ma%e distant ob6ects appear larger.

----- (. "ny large spacecraft on which humans can lie for e#tended periods.

----- *. Type of spacecraft that does not hae human occupants.

- Space station - &hrust

- Salyut ' - Satellite

- S(yla) - Space pro)e

- Mir - &hird la o! motion

- *nternational Space Station - Spectrometer


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----- +. Type of E radiation emitted by ery cool stars.

----- 1,. 7art of a space shuttle that can be naigated li%e an airplane.

----- 11. aw that e#plains how satellites stay in orbit.

----- 12. Type of E radiation with the lowest fre$uencies.

----- 13. ?irst space station launched by the J.S.

----- 14. @ehicle propelled by particles flying out of one end.

----- 1!. =eice that bends light with lenses to ma%e distant ob6ects appear larger.

----- 1'. eusable spacecraft for carrying people and cargo.

----- 1(. aw that e#plains how a roc%et wor%s.

----- 1*. Type of E radiation with the shortest waelengths.

----- 1+. =eice that brea%s down light into its component colors.

----- 2,. Circular or elliptical path around an ob6ect.

!ill in the lanAs. Direction: ?ill in the blan% with the appropriate term.

1. The full range of radiation that traels across space from stars is called the ----------.

2. ;umans could not go into space until they deeloped ---------- to carry them past EarthNs graity.

3. " telescope that uses lenses to focus light is called a/n0 ---------- telescope.

4. " telescope that uses mirrors to focus light is called a/n0 ---------- telescope.

!. The only light that humans can see is called ---------- light.

'. "/n0 ---------- analy5es light from stars to determine the elements the stars contain.

(. The color of isible light is determined by its ----------.

*. "s waelength decreases& wae fre$uency ----------.

+. ---------- fuel is needed to gie roc%ets enough power to escape EarthNs graity.

1,. ---------- third law of motion e#plains how a roc%et wor%s.

11. The first artificial satellite eer put into orbit was named ----------.

12. ;uman>made ob6ects in orbit are called ---------- satellites.

13. DewtonNs law of ---------- e#plains why satellites stay in orbit.

14. The space race too% place between the JS" and the ----------.1!. " space shuttle ta%es off li%e a/n0 ---------- and lands li%e an airplane.

1'. The first space station eer put into orbit was named ----------.

1(. The ---------- space station was the first ma6or space pro6ect in which the J.S. and ussia wor%ed together.

1*. The main purpose of the International Space Station is ----------.

1+. Challenger was a/n0 ---------- that bro%e apart shortly after ta%e>off.

2,. " spacecraft on wheels that can roam the surface of a planet is called a/n0 ----------.

Aanuary onthly E#amination in Science +> Chemistry

Identification. Direction: Choose the appropriate term to complete each sentence below.

- +eocentric model - uter planet - Hydra- Heliocentric model - *ron core - Meteorite- Ptolemy - enus - Ceres- .e)ular hypothesis - *nner planet - Meteor- +alileo - +reat dar( spot - Comet- Kepler - #upiter - .eptune- Copernican re%olution - Saturn -

Meteoroid- *ce cap - Planetary ring- Mars - /ranus- -


16/21

----- 1. Scientist who reised the geocentric model of the solar system to account for retrograde motions of some

planets.

----- 2. "ny of the four planets closest to the sun.

----- 3. argest planet in the solar system.

----- 4. hat a meteor is called after it lands on Earth.

-----!. Shift from an Earth>centered to a sun>centered model of the solar system.

----- '. Smallest planet in the solar system.

----- (. east dense of all the planets in the solar system.

----- *. Small& icy ob6ect with a ery elliptical orbit around the sun.

----- +. odel of the solar system that places the sun at the center.

----- 1,. =ust and other small particles that encircle an outer planet

----- 11. ?eature shared by all of the inner planets.

----- 12. @ery small& roc%y body that orbits the sun.

----- 13. Scientist who discoered that the orbits of planets are elliptical rather than circular.

----- 1!. "ny planet farther from the sun than ars.----- 1'. 7lanet with stronger winds than any other planet in the solar system.

----- 1(. Bne of 7lutoNs moons

----- 1*. odel of the solar system that places Earth at the center.

----- 1+. hat a meteor is called before it enters EarthNs atmosphere

----- 2,. 7lanet with the highest temperatures.

----- 21. ;uge storm on the surface of Aupiter.

----- 22. ost widely accepted e#planation for how the solar system formed.

----- 23. ?eature found only on Earth and ars.

----- 24. )ap in the methane clouds on Deptune

----- 2!. Inner planet that has two moons.

True or !alse. Direction: rite true if the statement is true or false if the statement is false.

----- 1. The asteroid belt lies between Earth and ars.

-----2. @enus has more olcanoes than any other planet in the solar system.

----- 3. SaturnNs rings are firmly attached to the surface of the planet.

----- 4. ost meteors burn up in the atmosphere.

----- !. The uiper belt contains comets& asteroids& and dwarf planets.

----- '. The length of a day on a planet can be determined from its orbital period.----- (. SaturnNs largest moon Titan is bigger than the planet ercury.

----- *. ?rom Earth& @enus appears ery bright because its surface is so hot that it glows.

----- +. Clouds on @enus contain carbon dio#ide& sulfur dio#ide& and sulfuric acid.

----- 1,. Ceres is a dwarf planet located in the uiper belt.

Essay. Direction: "nswer the following $uestion briefly. /!pts. Each0

1. Scientists are ery interested in studying asteroids. E#plain why.

2. The inner planets are also called the terrestrial planets. The outer planets could accurately be called the non>

terrestrial planets. E#plain why.

3. Summari5e how our understanding of the solar system changed from the ancient )ree%s through )alileo and

epler.

?ebruary onthly E#amination in Science + M Chemistry

True or false. Direction:rite true if the statement is true or false if the statement is false.

----- 1. Constellations appear from Earth to moe with the seasons.

----- 2. There are billions of gala#ies in the unierse.

----- 3. Edwin ;ubble used powerful telescopes to discoer other gala#ies.

----- 4. Bur sun is the biggest and brightest star in the gala#y.


17/21

----- !. "s the distance between gala#ies grows& the si5e of each gala#y shrin%s.

----- '. " star cluster may contain one or more gala#ies.

----- (. Stars are made mostly of hydrogen and helium.

----- *. Bpen star clusters contain more stars than globular star clusters

----- +. hen the unierse began& it was much larger than it is today.

----- 1,. The coolest stars are red in color.

----- 11. )ala#ies are diided into types based on si5e.

----- 12. In the first few moments after the ig ang& the unierse was ery hot and dense.

----- 13. Bnce a star forms& it neer changes.

----- 14. Spiral gala#ies are generally older than elliptical gala#ies.

----- 1!. The first matter to form in the unierse consisted of protons& neutrons& and electrons.

----- 1'. )raity causes a nebula to become denser at the center.

----- 1(. =warf gala#ies are often found near larger gala#ies.

----- 1*. Scientists thin% that stars and gala#ies ma%e up only a small part of the matter in the unierse.

----- 1+. Scientists hae proen conclusiely that dar% matter and dar% energy e#ist.

----- 2,. Some gala#ies contain oer a trillion stars.

Multi(le Choices. Direction: Encircle the correct answer.

1. "ccording to the ig ang theory". =ar% matter is changing to ordinary matter throughout the unierse.

. =ar% energy is pulling the unierse into blac% holes.C. The unierse will someday end because of a 8big bang.9

=. The unierse began with an enormous e#plosion.

1 ?rom our point of iew in the il%y ay )ala#y& all other gala#ies in the unierse appear to be

". Crowding closer together C. )etting dimmer . oing away from us =. )rowing larger

2 "fter the big bang occurred& the unierse

". Shran% in si5e C. ecame hotter

. ecame denser =. egan cool

3 ost scientists who study dar% matter thin% that it is

". " mi# of ordinary matter and matter we haenNt yet discoered.. atter that ma%es up blac% holes.

C. Aust a tiny fraction of all the matter that e#ists in the unierse.

=. Done of the aboe

4 Scientists recently discoered that the unierse

". ;as started to contract in si5e.

. Is e#panding een faster than before.

C. Is no longer e#panding or contracting.

=. ill soon go through another big bang! Scientists hae introduced the concept of dar% energy to e#plain the

". ate of growth of the unierse C. Brigin of dar% matter


18/21

. Contraction of the unierse =. "ll of the aboe

'. Types of star clusters include

". Bpen clusters C. Elliptical clusters

. Spiral clusters =. "ll of the aboe

(. Elliptical gala#ies contain

". " lot of gas and dust C. ostly red or yellow stars. ainly young stars =. Two of the aboe

*. Types of gala#ies include

". Spiral gala#ies C. Circular gala#ies

. Cluster gala#ies =. )lobular gala#ies

+. The stars in an open cluster are mostly

". Bld stars C. eddish stars

. Qoung stars =. Two of the aboe

1,. )ala#ies that do not hae a clearly defined shape are called

". =eformed gala#ies C. =warf gala#ies

. Irregular gala#ies =. Bpen gala#ies

11. Scientists estimate that the il%y ay )ala#y contains about

". 4,&,,, stars C. 4, million stars. 4,,&,,, stars =. 4,, billion stars

12. Some astronomers thin% that at the center of our gala#y there is a

". Deutron star C. ed supergiant

. Supernoa =. lac% hole

13. " group of stars that seem from Earth to form the outline of a familiar shape is called a

". inary star system C. Solar system

. Constellation =. )ala#y

14. Constellations appear to moe across the s%y each night because

". "ll stars hae orbits C. Earth reoles around the sun

. Earth rotates on its a#is =. Constellations are affected by earthNs graity

1!. hich color of star has the highest temperature:

". ed C. Qellow. lue =. Brange

Essay. Direction: "nswer the following $uestion briefly. /! pts. each0

). =escribe our own gala#y& and e#plain why it loo%s different to us than all other gala#ies:

2. hat are dar% matter and dar% energy& and why do scientists thin% they e#ist:

3. Compare the life histories of a medium star li%e our sun and a massie star li%e etelgeuse.


19/21

4thcentered model of the unierse was proposed by----------------.

". )alileo C. Copernicus

. 7tolemy =. Done of the aboe

3. The planet that is most similar to Earth in mass and diameter is--------------.

". ars C. Aupiter

. @enus =. ercury

4. hich statement is true about the inner planets of our solar system:

". They formed before the sun formed C. They include ars and Aupiter. They formed from dense elements =. They hae ery long years

!. "ll planets of our solar system orbit the sun

". In the same plane C. In the same direction

. "t the same speed =. Two of the aboe

'. "ll of the inner planets---------------.

". ;ae ery rapid rotation C. ;ae one or more moons. ;ae a thic% atmosphere =. "re solid& dense& and roc%y

(. hich statement about ercuryNs core is false:

". It is ery small C. It e#ists in a molten state

. It contains mostly iron =. It ma%es up 42R of mercuryNs olume

*. @enus has all of the following e#cept----------------.

". oons C. ountains. @alleys =. aa plains

+. hich process e#plains why @enus is ery hot:

". )reenhouse effect C. 7late tectonics

. @olcanic actiity =. Done of the aboe

1,. The inner planet with an aerage surface temperature of 14 C is-------------.

". ercury C. Earth

. @enus =. ars

11. The outer planets of the eight planets in our solar system include---------------.". ars C. 7luto

. Aupiter =. Two of the aboe

12. Compared with the inner planets& the outer planets----------------.

". "re much larger C. ;ae more moons. "re much denser =. Two of the aboe

13. The planet that has clouds of ammonia is--------------------.

". Jranus C. Aupiter

. Deptune =. Saturn

14. The biggest moon in the solar system orbits

". Deptune C. Saturn

. Jranus =. Aupiter

1!. Scientists thin% that SaturnNs moon Titan may--------------.

". ;ae an atmosphere li%e early EarthNs C. ;ae la%es of li$uid water

. e larger than EarthNs moon =. "ll of the aboe


20/21

1'. " group of stars that seem from Earth to form the outline of a familiar shape is called a----------.

". inary star system C. Solar system

. Constellation =. )ala#y

1(. Constellations appear to moe across the s%y each night because-----------------.

". "ll stars hae orbits C. Earth reoles around the sun

. Earth rotates on its a#is =. Constellations are affected by earthNs graity1*. hich color of star has the highest temperature:

". ed C. Qellow

. lue =. Brange

1+. hich class of star is our sun:

". C. )

. ? =.

2,. " star forms from a nebula when the temperature is high enough for------------.

". " supernoa to occur C. " blac% hole to collapse

. Duclear fusion to start =. ;eay elements to form

21. Types of star clusters include----------------.

". Bpen clusters C. Elliptical clusters. Spiral clusters =. "ll of the aboe

22. Elliptical gala#ies contain---------------.

". " lot of gas and dust C. ostly red or yellow stars

. ainly young stars =. Two of the aboe

23. Types of gala#ies include---------------.

". Spiral gala#ies C. Circular gala#ies

. Cluster gala#ies =. )lobular gala#ies

24. The stars in an open cluster are mostly------------------.

". Bld stars C. eddish stars

. Qoung stars =. Two of the aboe

2!. )ala#ies that do not hae a clearly defined shape are called------------------.

". =eformed gala#ies C. =warf gala#ies

. Irregular gala#ies =. Bpen gala#ies

2'. "ccording to the ig ang theory--------------------.

". =ar% matter is changing to ordinary matter throughout the unierse.

. =ar% energy is pulling the unierse into blac% holes.

C. The unierse will someday end because of a 8big bang.9

=. The unierse began with an enormous e#plosion.

2(. ?rom our point of iew in the il%y ay )ala#y& all other gala#ies in the unierse appear to be--------.

". Crowding closer together C. )etting dimmer

. oing away from us =. )rowing larger

2*. "fter the big bang occurred& the unierse------------------.

". Shran% in si5e C. ecame hotter

. ecame denser =. egan to cool

2+. ost scientists who study dar% matter thin% that it is". " mi# of ordinary matter and matter we haenNt yet discoered

. atter that ma%es up blac% holes

C. Aust a tiny fraction of all the matter that e#ists in the unierse

=. Done of the aboe

3,. Scientists recently discoered that the unierse

". has started to contract in si5e C. Is no longer e#panding or contracting

. is e#panding een faster than before =. ill soon go through another big bang

!ill in the lanAs. Direction: ?ill in the blan% with the appropriate term.

1. The inner planet that has two moons is ----------.

2. The four planets farthest from the sun are called the ---------- planets.

3. "steroids are not round li%e planets because they do not hae enough ----------.

4. " star that is made almost entirely of neutrons is called a/n0 ---------- star.!. The stars in an open cluster are young stars that all formed from the same ----------.

'. The astronomer who concluded that the unierse is e#panding was ----------.

(. The only planet in the solar system with cloc%wise rotation is ----------.

*. ased on their composition and si5e& the planets in $uestion 1 hae been gien the nic%name of ----------.

+. "steroids in the asteroid belt hae neer come together and formed a planet because the graity of ---------- %eeps them

apart.

1,. The color of a star is determined by the starNs ----------.

11. Eery star you can see from Earth with the unaided eye is part of the ---------- )ala#y.

12. The distance between gala#ies appears to be getting -----------.

13. The surface of ercury is coered with ancient ----------.


21/21

14. The energy of stars comes from reactions called ---------- reactions.

1!. The outer planets consist mostly of the elements hydrogen and ----------.

1'. "steroids that cross EarthNs orbit are called ---------- asteroids.

1(. Bur own gala#y is the type of gala#y called a/n0 ---------- gala#y.

1*. Scientists thin% that the 8big bang9 occurred about ---------- years ago.

1+. The planet that is closest to Earth is ----------.2,. ---------- has more olcanoes than any other planet.

21. ?our of the moons of Aupiter were first discoered by ----------.

22. The planet best %nown for its planetary rings is ----------.

23. efore meteors enter EarthNs atmosphere& they are called ----------.

24. Small ob6ects that orbit the sun in highly elliptical orbits are %nown as ----------.

2!. The ne#t stage that a main se$uence star will go through is ----------.

2'. "fter a supernoa& the core that remains becomes either a neutron star of a/n0 ----------.

2(. The ma6or gala#y closest to our own is the ---------- )ala#y.

2*. " spiral gala#y has a rotating dis% of stars and dust with seeral ---------- pro6ecting out from the center.

2+. "fter the big bang& the unierse became less dense and its temperature ----------.

3,. The first element to form after the big bang was ----------.

True or false. Direction: >rite TRE if the statement is correct and !"#SE if the statement is 5ron'.

----- 1. Done of the inner planets of the solar system has rings.

----- 2. Compared with the outer planets& the inner planets spin more $uic%ly.

----- 3. "ll of the inner planets are made of cooled igneous roc%.

----- 4. Each year on ercury lasts 6ust !* Earth days.

----- !. ost of ercury is e#tremely wet.

----- '. Saturn is the only planet with rings.

----- (. Aupiter may hae a small roc%y core.

----- *. Aupiter has fewer than 3, moons.----- +. AupiterNs moon Europa has some conditions suitable for life.

----- 1,. Thunderstorms hae been obsered on Jranus

----- 11. ost asteroids in the solar system are located between ars and Earth.

-----1 2. "steroids formed after the rest of the solar system formed.----- 13. Small asteroids sometimes collide with Earth.

-----1 4. "fter a meteor hits EarthNs surface& it is called a meteorite.

----- 1!. eteoroids are usually larger than asteroids.

----- 1'. Constellations appear from Earth to moe with the seasons.

----- 1(. Bur sun is the biggest and brightest star in the gala#y.

----- 1*. Stars are made mostly of hydrogen and helium.

----- 1+. The coolest stars are red in color.

----- 2,. Bnce a star forms& it neer changes.

-----2 1. There are billions of gala#ies in the unierse.

-----2 2. " star cluster may contain one or more gala#ies.

-----2 3. Bpen star clusters contain more stars than globular star clusters.

-----2 4. )ala#ies are diided into types based on si5e.----- 2!. Spiral gala#ies are generally older than elliptical gala#ies.

----- 2'. Edwin ;ubble used powerful telescopes to discoer other gala#ies.----- 2(. "s the distance between gala#ies grows& the si5e of each gala#y shrin%s.

----- 2*. hen the unierse began& it was much larger than it is today.

----- 2+. In the first few moments after the ig ang& the unierse was ery hot and dense.

----- 3,. The first matter to form in the unierse consisted of protons& neutrons& and electrons.

grade 9 - science- complete

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