١

Cairo Governorate Department : Science

Nozha Directorate of Education Form : �st Prep.

Nozha Language Schools Revision Sheet “Ismailia Road” Branch

Unit one Lesson (١)

Chemical combination

Choose the correct answer :

١. The number of the well known elements are …………………..element .

a. ١٠٠ b. ١١٠ c. ١١٢

٢. Metals are solids except ………….which is a liquid .

a. mercury b, magnesium c. sodium

٣. ………………..have ٣ , ٢ , ١ electrons in their outer electron shells .

a. Metals b. Non metals c. Noble element

٤. Non metals are bad conductors of electricity except ………………

a. Bromine b. Graphite c. Chlorine

٥. ……………is an atom gained an electron or more during the chemical reactions .

a. Positive ion b. Negative ion c. Neutral atom

٦. The ionic bond is a strong electrical attraction bond which occurs between

……………..

a. positive and negative ions b. negative ions only c. positive ions

only

٧. The types of covolent bonds are …………..

a. one b. two c. three

٨. ………..are not expected to form positive or negative ions in the ordinary

conditions .

a. Metals b. Non metals c. Noble gases

٢

Mention which is a metal and which is a non metal and why ?

8A

17B

12C

15D

13E

Compare between

Ionic bond Covalent bond

١.

٢.

١.

٢.

Positive ion Negative ion

Metals Non Metals

١.

٢. ٣

١.

٢.

٣.

Show by drawing the type of bond in the following

• Two oxygen atoms ( 8O )

• Two nitrogen atoms (7 N )

• Sodium atom ( 11Na ) and chlorine atom (

17Cl )

• Hydrogen atom ( 1H ) and chlorine atom (

17Cl )

Give reason for :

١. The covalent bond in oxygen molecule is double covalent bond , while in nitrogen

molecule is triple covalent bond .

٢. Noble gases don't participate in any chemical interactions .

٣

Lesson ( ٢ )

Chemical compounds

What's meant by

١. Valency …………………………………………..

………………………………………………………………………………………………………

٢. The atomic Group ……………………………….

………………………………………………………………………………………………………

٣. Chemical formula ………………………………

………………………………………………………………………………………………………

٤. Acids …………………………………………

………………………………………………………………………………………………………

٥. Bases …………………………………………

………………………………………………………………………………………………………

٦. Alkalis ……………………………………….

………………………………………………………………………………………………………

Put (√ ) or ( x ) and correct the wrong ones :

١. The chemical formula of potassium hydroxide is K(OH )2

………………………………………………………………………………………………………

٢. Sulphuric acid consists of ٧ atoms from ٣ elements .

………………………………………………………………………………………………………

٣. Acids change the colour of litmus to red

………………………………………………………………………………………………………

٤. Silver chloride doesn't dissolve in water .

………………………………………………………………………………………………………

٥. Al2O

3 is the chemical formula of Aluminum oxide .

………………………………………………………………………………………………………

Compare between

Acids Bases

١.

٢.

١.

٢.

Give reason for :

١. All alkalies are bases , and not all bases are alkalies .

………………………………………………………………………………………………………

٤

Choose from column ( B ) that suits in column ( A ) :

( A ) ( B )

١. H٢So٤

٢. NaCl

٣. Na O H

a. turns red litmus into blue

b. turns blue litmus into red

c. doesn't affect the litmus paper

d. turns the blue litmus into red and the

red into blue .

- Write the chemical formula for the following molecules :

- Ammonium chloride

………………………………………………………………………………………………………

- Aluminum sulphate

………………………………………………………………………………………………………

- sodium carbonate

………………………………………………………………………………………………………

Name each of the following :

Cu ( NO3 )

2 - HNO

3 – NaOH

٥

Conc

.

Lesson ( ٣ )

Chemical Equation and chemical reaction

Write the scientific term for each of the following :

١. It's the process in which bonds in reactants are broken and bonds in resultants

are formed ……………………

٢. It's a set of symbols and chemical formula representing the reactants and the

products molecules in the chemical reaction and the conditions of the reaction

…………………………..

٣. The total amount of reactants masses is equal to the total amount of products

masses ………………………

٤. Chemical reactions accompanied by heat energy releases …………………………

٥. Chemical reactions need heat energy absorption to be occurred ……………………

٦. Combination of an acid with an alkali forming salt and water ……………………..

٧. The reactions which involve the splitting of compounds into elements or simpler

compounds by the effect of heat ……………………..

What happens when :

١. Magnesium strip burns in the presence of air .

………………………………………………………………………………………………………

٢. A glass rod wet with ammonia solution is exposed to a test tube containing

concentrated hydrochloric acid .

………………………………………………………………………………………………………

٣. Green copper carbonate is heated .

………………………………………………………………………………………………………

Complete the following

١) C + ………… CO2 + heat

٢) NaNO3 ………… +……………

٣) ………….. CuO + CO2

٤) …………. + …………. NH4 Cl

٥) Nacl + AgNO3 …………… + ………….. ( White ppt. )

٦

Mention the three types of the chemical reactions :

١…………………………..

٢………………………….

٣………………………….

Give reason for :

١. The chemical equation should be balanced .

………………………………………………………………………………………………………

٢. Formation of black colour after heating of green copper carbonate .

………………………………………………………………………………………………………

٣. White clouds are formed after the reaction between ammonia and hydrochloric

acid .

………………………………………………………………………………………………………

٤. A white powder is formed when a magnesium strip burns in air .

………………………………………………………………………………………………………

٥. A white ppt. is formed on adding silver nitrate solution to sodium chloride

solution .

………………………………………………………………………………………………………

٦. An excess amount of carbon dioxide mereases the atmospheric temperature .

………………………………………………………………………………………………………

٧. Carbon monoxide has a dangerous impact on the human beings .

………………………………………………………………………………………………………

٧

Unit ( ٢ ) Lesson ( ١ )

Universal forces in nature

Choose :

١. The gravitational universal law of Newton can be given from the relation …………

a. F 21

2

mm

dα b. F

2

21

d

mmα

c. F 2

21

d

aaα d. F

21

2

aa

dα

٢. A car of mass ٥٠٠ kg and another of ١٥٠٠ kg moves with the same acceleration ,

the acting force of the greater mass …………….that of the car of the smaller mass .

a. equals to b. equals half

c. equals double d. equal three time

٣. The unit of measuring the weight is …………

a. m / sec b. Joule c. Newton d. Kg

٤. The weight of the body increases as its ………….increase .

a. distance b. charge

c. mass d. square of distance

٥. The electrostatic force between two charges q , q is directly proportional with

…………..

a. q1,q

2 b. d 2 c. d d.

21

1

qq

Put (√) or ( x ) and correct the wrong :

١. The gravitational force between two bodies is directly proportional to the square

distance between them . [ ]

………………………………………………………………………………………………………

٢. When the distance between two bodies is doubled , the gravitational force

between them does not change . [ ]

………………………………………………………………………………………………………

٣. weight of the body does not change from place to another on the earth's surface

while mass of the body changes [ ]

………………………………………………………………………………………………………

٨

٤. The unit of measuring weight is Newtone / kg . [ ]

………………………………………………………………………………………………………

٥. Like charges repel while unlike charges attract . [ ]

………………………………………………………………………………………………………

٦. The atom stores great energy in the electron . [ ]

………………………………………………………………………………………………………

٧. Dynamo is used to change electric energy to magnetic energy . [ ]

………………………………………………………………………………………………………

Complete :

١. The mass of the body at the earth's surface is ………….its mass in the moon's

surface .

٢. ……………..increases as we come near to the earth's center .

٣. Like charges …………….while unlike charges ………………

٤. The electric current has ……………….effect .

٥. The work done on raising a body distance increases by increasing ………………..of the

body .

٦. The electromagnet is used in some machines such as ……………..and ………………..

٧. The electric generator is used to change …………….energy to ……………energy like

………………….

٨. The motor changes ……………..energy to ………………..energy like ……………….

٩. ……………………is used in Egypt to generate electricity .

Give reason for :

١. The change of the weight of the body from place to another while the mass of

the body is constant .

………………………………………………………………………………………………………

٢. The gravitional force is more obvious between the celestial bodies .

………………………………………………………………………………………………………

٩

٣. On rubbing some bodies they gain the ability to attract small things like paper .

………………………………………………………………………………………………………

٤. The gravitional force between two masses increases as the distance between

them decreases .

………………………………………………………………………………………………………

٥. The electrostatic force between two equal charges and different in the type

decreases to quarter when the distance between them is doubled .

………………………………………………………………………………………………………

Problems

١. A body of mass ٥٠ Kg at the Earth's surface

( acceleration due to gravity = ٩�٨ m / sec 2 ) fined

a. The weight of the body on the earth .

b. The mass of the body on the moon's surface .

٢. Find the mass of a body of weight ٣٠٠ N. knowing that the gravitional

acceleration = ١٠٠ m / sec 2 .

١٠

Lesson ( ٢ )

Accompanied forces with motion

Choose :

١. The inertia of the body increases by increasing the body …………..

a. volume b. mass c. displacement d. density

٢. If the net force acting on a body at rest is absent , the body ………….

a. moves with uniform velocity b. remains at rest

c. moves with uniform acceleration d. moves with non uniform velocity

٣. The fractional force acting on a body is ………………to the direction of motion .

a. opposite b. in the same direction

c. parallel d. perpendicular

٤. The centrifugal force acting on a body increase by increasing its ……………….

a. weight b. velocity c. volume d. distance

٥. A part of the mechanical energy is lost as heat energy due to the ………….between

the rode and a moving car .

a. attraction force b. fractional force

c. centripetal force d. magnetic force

Give reason for :

١. On the stop of peddling , the bike stops after a short distance .

………………………………………………………………………………………………………

٢. The fall of a metal coin down in a cup when the card is drawn suddenly .

………………………………………………………………………………………………………

٣. It is difficult for the huge trunks to stop suddenly .

………………………………………………………………………………………………………

٤. It is necessary to use the seat belt while driving .

………………………………………………………………………………………………………

٥. When a person jumps from the bus , he should run a certain distance .

………………………………………………………………………………………………………

٦. Machine must be lubricated from time to time .

………………………………………………………………………………………………………

٧. Children in the rotating barrel ( bucket ) in the amusement park are stuck against

the wall .

………………………………………………………………………………………………………

١١

Put ( √ ) or ( x ) and correct the wrong :

١. The centrifugal force affects on the body which moves in a straight line [ ]

………………………………………………………………………………………………………

٢. The direction of the centrifugal force is perpendicular and to ward the center

………………………………………………………………………………………………………. [ ]

٣. Inertia is the tendency of the body to maintain its state . [ ]

………………………………………………………………………………………………………

٤. The centripetal force equals to the centrifugal force in magnitude and direction

……………………………………………………………………………………………………….. [ ]

٥. The attraction force increases the velocity of bodies . [ ]

………………………………………………………………………………………………………

٦. Passengers tend to move forward on stopping the car suddenly due to inertia .

……………………………………………………………………………………………………….. [ ]

١٢

Lesson ( ٣ )

Wave motion

Choose :

١. The motion of the incircular path is an example of ……………….motion .

a. periodic b. vibration

c. translation d. wave

٢. Types of motion are ………………….

a. mechanical and periodic b. electromagnetic and circular

c. translatory and periodic d. mechanical and electromagnetic

٣. …………….is used in remotsensing instruments .

a. ultraviolet b. inferared

c. X ray d. Gama rays

٤. Mechanical waves are used in all the following except …………………..

a. Digonance by using ultrasonic waves b. Musical instrument

c. sound amplifiers d. preservation of food

٥. The motion of projectile is an example of ……………..motion .

a. translation b. vibrational

c. circular d. periodic

٦. The uniform velocity is represented graphically by …………….line .

a. parallel b. carved c. straight d. zigzag

٧. The graph …………….represents a body at rest .

a. b. c. d.

t

Write the scientific term :

١. The body covers equal displacement in equal interval of time . [ ]

٢. Kind of radiation used in manufacture of sterilizing equipment.[ ]

٣. Waves that need medium to propagate. [ ]

٤. The motion between two points , starting and ending points . [ ]

٥. Kind of radiation used in studying the internal composition of metals .

[ ]

٦. The body covers different displacement in equal interval of time .

[ ]

v

t

x

t

v x

t

١٣

٧. Kind of radiation used in discovering some types of tumers . [ ]

٨. Waves can transmit through material and non material medium [ ]

٩. Change an object position or its direction with time passes in proportion to

another object and in proportion to a fixed point know as a fram of reference.

[ ]

Put (√ ) or ( x ) and correct the wrong ;

١. The translatory motion repeats itself at equal interval of time [ ]

.……………………………………………………………………………………………………

٢. thunder is heared before the appearance of lightning . [ ]

………………………………………………………………………………………………………

٣. Ultraviolet radiation is used in the remote control of the electric appliances .

[ ]

………………………………………………………………………………………………………

٤. Sound is a mechanical wave while light is an electromagnetic wave [ ]

………………………………………………………………………………………………………

Give reason for :

١. Vibration and wave motion represent an example of the periodic motion .

………………………………………………………………………………………………………

٢. Infrared radiation are used in cooking .

………………………………………………………………………………………………………

٣. Lighting appears before thunder .

………………………………………………………………………………………………………

٤. Ultraviolet radiation is classified as electromagnetic wave .

………………………………………………………………………………………………………

What are the properties of mechanical waves ?

In the following table :

Displacement ٣٠ ٢٠ ١٠

Time ( sec ) ٣ ٢ ١

١. Draw the graphical relation between displacement on Y – axis and time on X- axis

٢. mention the type of velocity .

١٤

Unit ( ٣ ) Lesson ( ١ )

Celestial Bodies

I- Complete :

١. The force of Gravity between two bodies depends on ……………………,………………..

٢. The group of small inner planets in solar system are ……………………..,

……………….,………………,…………………

٣. The group of big outer planets in solar system are …………, …………, …………., ………….

٤. Galaxy is …………………………….

٥. Light year is …………………………………………

٦. Asteriods are ………………………………………….

٧. planets are ……………………………………………

٨. Meteriotes are …………………………………………

٩. comets are ……………………………………………..

١٠ . Solar system are formed of ………………….,……………..,………………,………….,………….,…………

١١. The largest planet in size is ……………….and in density is ……………….

١٢. The nearest planet to the sum is ……………………..and the farthest is ………………………

Compare between

a. Universe and galaxy

b. Meteorites and comets

c. planets and asteroids

Give reason for ;

١. The gravity on earth's surface is more than that on Mars .

………………………………………………………………………………………………………

٢. The density of outer planets is small .

………………………………………………………………………………………………………

٣. Astronomers do not measure the distance between stars by Km .

………………………………………………………………………………………………………

٤. Usage of telescopes .

………………………………………………………………………………………………………

٥. The density of inner planets is large .

………………………………………………………………………………………………………

١٥

Write the scientific term :

١. Solidified masses of ice and gases and pieces of rocks revalue around sun .

[ ]

٢. A star system consists of million of stars . [ ]

٣. Celestial small bodies that under the force of gravity between planets .

[ ]

٤. A device used to see celestial bodies . [ ]

٥. planets which have around them a large number of moons . [ ]

Choose the right answer :

١. The planets revolve around the sun in orbits .

a. circular b, elliptical c. spiral d. irregular

٢. Which of the following planets has bigger gravity on its surface .

a. Earth b. Venus c. Mars d. Pluto

٣. The solar system consists beside the sun

a. ٨ planets only b. Asteriods and comets and Meteriots only

c. ٣ planets and stars d. ٨ planets beside Asteriods and

comets and Meteriotes

٤. There are a device to see celestial bodies ………

a. Microscope b. telescope c. magnifying lens

d. convex lens

٥. The closest planets to sun is

a. Mercury b. Jupiter c. Earth d. Pluto

٦. The farthest planet from sun is …………..

a. Neptune b. Jupiter c. Venus d. Uranus

١٦

Lesson ( ٢ )

Planet earth

I- Complete :

١. Earth is ……………………………………………….

٢. The position of the earth from the sun in the solar system is ………………………….

٣. Mass of the Earth is ……………………………………………

٤. The size of the earth is …………………………………………

٥. The components of earth's atmosphere are ………….,……………..,………….,………….,………….

٦. The importance of Atmospheric air of earth is ……………….,…………………,………………

٧. The importance of water for living organisms is …………,………………,……………..,…………….

٨. The Atmospheric pressure on earth is …………………….cm Hg .

٩. The structure of earth consists of ……………….., …………………., ………………….

١٠. The inner core of earth consists of …………………………………………..

١١. The outer core of earth consists of ……………………………….

١٢. The earth crust is …………………………..

١٣. The mantle is ……………………………..

What is the importance of

a. oxygen gas

……………………………………………………………………………………………………………………….

b. carbon dioxide gas

……………………………………………………………………………………………………………………….

Give reason for

١. Burning small comets before reaching earth .

……………………………………………………………………………………………………………………….

٢. Protection of living organisms on earth from harmful ultraviolet rays of sun .

……………………………………………………………………………………………………………………….

٣. The Atmospheric pressure on earth is ٧٦ cm Hg .

……………………………………………………………………………………………………………………….

٤. The temperature on earth is suitable for life of living organisms .

……………………………………………………………………………………………………………………….

١٧

٥. steadfastness of hydrosphere on earth's surface .

……………………………………………………………………………………………………………………….

٦. inner core of earth is rich in iron and nickel .

……………………………………………………………………………………………………………………….

Write the scientific term :

١.It is detected by ٧٦ cm Hg .

……………………………………………………………………………………………………………………….

٢. Third rank far from sun .

……………………………………………………………………………………………………………………….

٣. rich in nickel and iron

……………………………………………………………………………………………………………………….

٤. A gas used in photosynthesis process .

……………………………………………………………………………………………………………………….

١٨

Lesson ( ٣ )

Rocks and minerals

I- Complete :

١. Igneous rocks are the rocks that formed from ……………………….

٢. Sedemintary rocks are the rocks that formed from …………………

٣. Metamorphic rocks are the rocks that formed from ………………..

٤. …………………., ………………are Igneous rocks

٥. ………………….,……………….are Sedemintary rocks .

٦. ………………….,………………are Metamorphic rocks

٧. Igneous rock are divided into ………………rocks and ………………..rocks .

What are the main factors that led to formation of Metamorphic rocks ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

Which of these rocks are sedimentary and which are Igneous .

Marble – Granite – Lime stone – sandstone – Basalt .

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

Give reason for :

١. Volcanic rocks have small circular holes .

……………………………………………………………………………………………………………………….

٢. Effervescence happens on putting hydrochloric acid on lime stone .

……………………………………………………………………………………………………………………….

٣. The crystals of minerals that form plutanic igneous rocks are large sized .

……………………………………………………………………………………………………………………….

٤. Volcanic rocks have no time to complete crystallization .

……………………………………………………………………………………………………………………….

١٩

What are the components of the following :

a. olivine

……………………………………………………………………………………………………………………….

b. pyroxene

……………………………………………………………………………………………………………………….

c. sand stone

……………………………………………………………………………………………………………………….

d. lime stone

……………………………………………………………………………………………………………………….

e. Quartz

……………………………………………………………………………………………………………………….

f. Bazalt

……………………………………………………………………………………………………………………….

g. Marble

……………………………………………………………………………………………………………………….

Compare between Igneous sedmintary & Metamorphic rocks from the point of

formation , example .

٢٠

Lesson ( ٤ )

Earthquakes and Volcanas

I- Complete

١. Earthquake is ………………………………………………………..

٢. Volcano is …………………………………………………………….

٣. Seismograph is ………………………………………………………..

٤. The dangers that result from earth quake are …………………………

٥. The parts of volcano are ……………………..,……………………….,………………………

٦. The ejected substances from the volcanic eruptions ………………..,………………,………………

٧. From the benefits of volcano ……………….,…………………..,………………………

٨. The dangers resulted from the volcano are ,……………………………………………………………..

٩. What you do when an earth quake happens ………………..,………………,………………

١٠. After happening of the earthquake directly ,you should ………………,…………….,…………

١١. From the benfits of the earthquakes …………………,………………….

١٢. The main reason for earthquake is ………………………………………..

Give reason for :

١. Happening of earthquakes .

……………………………………………………………………………………………………………………….

٢. Magma comes out to the earth's surface through volcano .

……………………………………………………………………………………………………………………….

٣. Happening of volcanoes .

……………………………………………………………………………………………………………………….

٤. After earth quake we should go to gardens and away from the harmed buildings.

……………………………………………………………………………………………………………………….

٥. Vibration of earth during earth quake

……………………………………………………………………………………………………………………….

٦. Volcano ash (dust ) that cover areas far away from volcano .

……………………………………………………………………………………………………………………….

٢١

Write the scientific term :

١. Rocks formed from fused substances under earth's crust .

……………………………………………………………………………………………………………………….

٢. Rocks that make thin cover around ٧٥ % of earth's surface

……………………………………………………………………………………………………………………….

٣. Rocks formed from pressure and heat on Igneous and sedmintary rocks .

……………………………………………………………………………………………………………………….

What are the parts of the volcano ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

What are the volcano materials ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

What is the fault ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

What are harms of volcano ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

What are harms of earthquakes ?

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….

……………………………………………………………………………………………………………………….