First question: Choose page (80,81,82):-

1- 10 Kg.2- Spring balance.3- 2 Newton.4- 100 gm.5- 500 gm.6- 71 Newton.7- Copper.8- Glass and wood.9- The change of liquids volume with the change in temperature.10-The presence of constriction in the capillary tube.11-Give limited extent to measure the temperature.12-Nitrogen13-O2

14-oxygen 15-oxygen and water16-ammonia17-carbon dioxide18-spinal cord19-cerebellum20-controlling the involuntary processes21-elbow

Second question: page (82):-

1. Problem: a. Mass = 300 gm, mass has no direction.b. wt (N) = mass (kg) x 10

= 3001000 x 10 = 3 Newton

Weight is directed towards the center of the Earth

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Science Department First Term

Model answer for the school book questions

Prim (6) Exercise (1)

c. Mass is a constant value, it doesn’t change by changing its place.

Weight is a variable value, it changes by changing its place.

2. Mention one function: a. See book p.71.b. See book p.71.c. See book p.63.d. See book p.64.e. See book p.71.

3. Explain the following a. To prevent mercury from returning back to the bulb before knowing the

temperature.b. Because water boils at 100oC while the scale of clinical thermometer

starts from 35oC and ends at 42oC.c. See book p.26.d. See book p.40.e. Due to formation of Calcium Carbonate which is insoluble in water.f. Due to the relative constancy of its volume at the change of

temperature.4. What would happen

a. We can’t control the burning effect of oxygen and we lose the main component of all proteins of living organisms.

b. Suffocation of living organisms – global warming and increase in the temperature of the Earth.

c. This will not allow movement between bones.d. It will move in all directions.e. See book p.67.f. See book p.67.

5. How to obtain a. See book p.51.b. See book p.46.c. See book p.37.

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Exercise (2)

First question: Complete page (84):-

1- cranial, spinal.2- myelin3- cerebrum, cerebellum and medulla oblongata.4- nervous tension and affect sleeping periods and heart beats.

Second question: Choose page (84):-

1- gray.2- The eye close on approaching an external body.3- Two cerebral hemispheres.

Third question: Give reason page (85):-

1- Because the weight of anybody depends on the gravity of the planet on which the body exists.

2- Because wood and plastic are heat insulators, while aluminum is a good conductor of heat.

3- Because the scale of the clinical thermometer is from 35 to 42, while the boiling point of liquids is more than 35 (boiling point of water is 100)

4-Because mercury is a good conductor of heat and it is shiny that can be seen easily. (See book P-26)

5- Because it scarcely dissolves in water.

6- To breath under water.

7- Because oxygen gas is consumed during respiration and combustion process and it is released by the green plants during photosynthesis process.

8- Because it is important for the green plants to make their food through photosynthesis process.

9- Because nitrogen is the main component of proteins which form the tissues of the living organism’s bodies.

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Fourth question: Compare(85):-

Mass weight

definition The amount of matter in an object The force that attract the body to the earth

unit Kilogram or gram newton

Device used Balance scale Spring scale

direction Has no direction Toward the center of earth

Effect of different place constant Change from planet to another

Celsius thermometer Medical thermometerRange of scale 0 c → 100 c 35 c → 42 c

constriction There is no constriction There is a constrictionusage Measure temperature of

liquidsMeasure temperature of human body

Liquid used mercury Mercury

Bad heat conductors

Heat conductors Heat insulatorsdefinition They are materials that allow heat to

transfers throughThey are materials that don’t allow heat to

transfers through

examples Copper – aluminium - iron Wood – glass – plastic

usage Making cooking pot & tea boilers Making handless of cooking pot & tea boilers

Oxygen gas Co2Colorless, tasteless and odorless gas. Colorless, tasteless and odorless gas.

Scarcely dissolves in water. Easily dissolves in water.It has a neutral effect on litmus paper (red and blue litmus papers).

It has a neutral effect on litmus paper (red and blue litmus papers).

It doesn’t burn, but it helps in burning It doesn't burn, and it doesn’t help in burning

It is heavier than air as it replaces the air It is heavier than air as it replaces the airIt is collected by down word displacement of

water.It is collected by up word displacement of air

Fifth question: What would happen (86):- 4

1-Harm the joint and tendons

2-It will harm the nervous system (affect sleeping periods and heart beats and leads to nervous tension)

3- It will harm the nervous system (causing nervous tension)

Sixth question: What is the role of the following (86):-

1-Muscles generate mechanical energy and movement to the body because of its ability to contract and relax.

2-Manganese dioxide acts as a catalyst as it helps in the dissociation of hydrogen peroxide into water and oxygen gas.

3-It is a metal (good conductor of heat & shiny that can be seen easily), so It helps us to know the temperature.

4-It is the main building unit in the human nervous system.

Exercise (3)

First question: Complete page (87,88,89):- 1-Kg, Newton.

2-Object’s mass, planet where object exists, distance from center of the Earth.

3- 16

4-Object’s mass

5-Attraction force, weight.

6-Force by which a body is attracted to the planet.

7-A form of energy that transfers from the higher temperature object to the

lower temperature object.

8-Hotness, coldness

9-Allow heat to flow through as aluminum – copper – iron.

10- Don’t allow heat to flow through as wood – plastic – paper.

11- Paper and glass

12- Volume, temperature.

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13- Celsius, medical.

14- Temperature of liquids.

15- Green plants during photosynthesis

16- Respiration, combustion.

17- Respiration, combustion.

18- Organic materials as oil- gasoline, respiration.

19- See book p.47.

20- 78%

21- Stainless steel

22- Central and peripheral nervous system.

23- Cerebrum, cerebellum and medulla oblongata.

24- Skull, backbone and rib cage.

Second question: put (√) or (x) page (89,90):- 1- (x) 6- (x) 11- (X)

2- (x) 7- (√) 12- (√)

3- (x) 8- (x) 13- (√)

4- (x) 9- (√) 14- (x)

5- (x) 10-(x) 15- (√)

third question: write the scientific term page (90, 91):- 1-Mass.

2-Weight.

3-Heat conductors.

4-Heat insulators.

5-A thermometer.

6-Carbon dioxide gas.

7-Oxygen gas.

8-Carbon dioxide gas.

9-Nitrogen gas.

6

10- Nerve cell (neuron)

11-Skull

12-Spinal cord

13-Backbone

14-Involuntary muscles.

15-Slightly movable joints.

16-Tendons.

Fourth question: Correct the following page (91, 92):- 1- (immovable joints) freely movable joints

2- (The cartilages) The tendons

3- (31 pairs) 12 pairs

4- (The spinal cord) Medulla oblongata

5- (over) below

6- (gelatinous) fatty

7- (axons) axon terminals

8- (Nitrogen) Carbon dioxide

9- (Oxygen) Nitrogen

10- (four) three

11- (37oC to 45oC) (35oC to 42oC)

12- (same rate) different rates

13- (1 Kg) 6 Kg

14- (100 gm) 1000 gm

15- (alcohol) mercury

Fifth question: Choose (92, 93):- 1- Slightly movable.

2- Joint

3- Earth

4- 10

7

5- 1

6- All the previous

7- Carbon dioxide

8- Calcium carbonate

9- Nitrogen

Sixth question: What is the scientific reason (94),(95)&(96):- 1- Because of the Earth’s gravity force.

2-Because aluminum is a good conductor of heat while plastic and wood are

heat insulators.

3-To prevent any vibration and take on an accurate measurement.

4-Because of the body’s weight which is affected by the gravitational force of

the Earth.

5-Because of the change in the gravity from planet to another.

6-Because the weight of the body decreases by increasing the distance

between the body and the center of the Earth.

7-To prevent mercury from returning back to the bulb before knowing the

temperature.

8-Because it act as a catalyst that doesn’t change in quantities or properties.

9-It protects the Earth from harmful radiations that come from the sun. Also, it

adjusts the temperature of the Earth’s surface.

10- Due to burning large amount of fuel in factories and means of

transportation and the removal of forests.

11- Because it doesn't burn, and it doesn’t help in burning.

12- Because yeast produces co2 during fermentation which expands by heat

making the bread porous and tasty.

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13- Because Co2 is used by the green plants to make their food and produce

oxygen gas which is important for the respiration of all living organisms.

14- Because of the formation of ammonia gas which has a very pungent smell.

15- Because it is an inactive gas (doesn’t burn and doesn’t help in burning) and

also it doesn’t include in respiration process.

16- Because they have a passive effect on the nervous system as they affect

sleeping periods, heart beats and lead to nervous tension.

17- Cerebellum maintains the balance of human body during movement.

18- Because medulla oblongata regulates the involuntary processes of the body

as regulating heart beats and movements of respiratory system.

19- Due to the reflex action made by the spinal cord.

20- To prevent bone diseases such as osteomalacia and rickets.

21- Because they have involuntary movements regulated by medulla oblongata.

22- Because upper limbs allow eating, drinking, writing and holding things while

lower limbs allow walking, running, standing, sitting and carrying the rest of

the body.

23- Because muscles generate mechanical energy and movement to the body

because of its ability to contract and relax.

24- To prevent friction between vertebrae of the backbone during movement

25- To protect it.

26- Because this will cause increase in the percentage of CO2 in the air leading

to the suffocation of living organisms and global warming, in addition, it will

decrease the percentage of oxygen which is necessary for respiration and

combustion processes.

27- Because oxygen becomes lighter when we rise above the Earth’s surface.

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Question 7 page 96 (mention the importance)

1-Earth gravity: keeps the objects steady on earth surface

2- Thermometer: is used to measure temperature

3-Two arm balanced scale: is used to measure mass of objects.

4-Spring scale: is used to measure weight of objects.

5-The plastic handles of cooking pots: help us to hold the cooking pots

6- The ribcage:- Protects the heart and lungs. Helps in respiration process.

7- The cartilage: Prevent friction between bones

8- Tendons: Fix muscle to the bone.

9- The joints: Help in movements

10- The dendrites of the nerve cell: Connect the nerve cells to each other forming synapse.

Eighth question page 97 : compare:

Central nervous system Peripheral nervous systemIt consists of brain and spinal cord It consists of cranial nerves and spinal

nerves Brain is the control center of the

body Brain controls and coordinates all

the body process Spinal cord responsible for reflex

action Spinal cord delivers messages

between brain and sensory organ

They deliver message between the brain and all body organs

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Two arm balance scale Spring scale Used to measure mass of

objects Used to measure weight of

objects

Ninth question ( what is the main use) page 98

1 – the good heat conductor substance

Used in making cooking pots and kettle.

2- The bad heat conductor substance

Used in making handles of cooking pots.

3- The oxyacetylene flame

Used in cutting and welding of metals.

4- The lime water.

Used to test for presence of carbon dioxide.

5- Manganese dioxide in oxygen preparation

It acts as a catalyst.

6- Carbon dioxide in our daily life.

Used by the plant to make its own food by photosynthesis process.

7- Nitrogen gas in our daily life

Used by the plant to make its protein

Tenth question page 99 ( define)

1-Mass: it is the amount of matter in an object.

2- Weight : it is the force with which the body is attracted to the Earth.

3- Heat : it is the form of energy transfer from hot objects to cold objects.

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Axial skeleton Appendicular skeleton It consists of skull, backbone and

ribcage. It consists of upper limbs bones

and lower limbs bones.

4-Temperature : it is degree of hotness or coldness of body.

5-The good heat conductor substances:

They are substances that let heat flow through.

6- The bad heat conductor substances

They are substances that don t let heat flow through.

Eleventh question page 100:

1 -A mass of cleansing wire before and after heating

The wire become heavier after burning

2-The decrease of the carbon dioxide quantity in nature

The plant will not be able to make its food by photosynthesis process

3-The decrease of oxygen quantity in nature

The living organisms can’t respire and the combustion process doesn’t occur.

4-The decrease of nitrogen quantity in nature

The plant can’t make its protein.

5-There is no earth gravity

All objects on Earth’s surface don’t have weight.

6-The overtake of stimulating substances

It will harm the nervous system

7-Jumping from high places

It will harm the locomotory system

Twelfth question: page 101,102 (Join)

1- (a,4) (b,3) (c,1) (d,2)

2- (a,2) (b,1) (c,3) (d,4)

3- (a,5) (b,4) (c,1) (d,3) (e,7) (f,6) (g,2)12

4- (a,4) (b,5) (c,3) (d,2) (e,1) (f,6) (g,7)

Thirteenth question: page 103

1- wt on Earth(N) = m(kg) x 10

= 10 x 10 = 100 Newton

2- wt on Earth(N) = m(kg) x 10

= 6 x 10 = 60 Newton

wt on the Moon = 16 x wt on the Earth

= 16 x 60 = 10 Newton

3- wt on Earth(N) = m(kg) x 10

= m(kg) x 10 = 300 Newton

m(kg) = 30010 = 30 kg

4- Mention two methods to keepa. Nervous system (see book P.67)b. Skeletal system (see book P.74)

Exams on the first term

Exam (1)1-Complete

a- axial skeleton, appendicular skeleton.b- Kg, Newtonc- Celsius

2-Put (√) or (x) and correct

a- (x) Brainb- (x) weightc- (x) hot object to a cold object.

3-Mention the function of

a- Book p.7113

b- Book p.64c- Book p.25d- To help carrying the cooking utensils without harming your hands

because plastic is a bad conductor of heat.4-Give reason

a- To protect themb- Because the mass of the Moon is lesser than the mass of the Earth so

that the force of the Moon’s gravity is lesser than the Earth’s gravity.5-What happens if

a- Movement between bones is not allowed.b- We feel hot and withdraw our hands quickly due to the reflex action

made by spinal cord.c- Leguminous plants can’t produce their proteins from atmospheric

nitrogen.6-Write the scientific term

a- Human nervous system.b- Balance scale.c- Heat conductors (good conductors of heat).d- Spinal cord.

Exams on the first termExam (2)

Q1-Choose the correct answer

1- Spinal nerve.2- 1 Newton3- Glass and wood4- Oxygen5- Carbon

Q2-Explain the following:

a. Answered before p.94b. Because mercury remains liquid between two degrees temperature

-39oC and 357oC

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c. Because O2 scarcely dissolves in water.d. Because N2 is an inactive gas.e. To keep your locomotory system healthy and to avoid bone diseases

such as osteomalacia and rickets.Q3-A-What would happen

a- Living organisms can’t respire and they will die.b- We can move our arms in one direction only.c- This will cause a passive effect on the locomotory system such as

osteoporosis.Q3-B-Mention one function

a- They allow the movement between bones.b- It regulates and coordinates all the vital processes within the body.

Q4-A-Explain how to obtain

a. See book p.51.b. See book p.46.

Q4-B-Mention one function

a- See book p.63.b- See book p.25.c- See book p.53.

Q5-Correct the following

a- (copper) wood-glass-plastic……..etc.b- (limited movement joint) immovablec- (decreases) increasesd- (oxygen) carbon dioxidee- (gunpowder) atmospheric airf- (oxygen) carbon dioxide

Exams on the first termExam (3)

Q1- Choose the correct answer

1- 2 Kg.

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2- Newton3- 35 : 42 Celsius degrees4- Bread5- Knee

Q2-A- Mention one function:

1. See book p. 642. See book p.7

Q2-B-Write the scientific term:

a. Spring scale.b. Carbon dioxide gas.c. Reflex action.d. Mass.e. Brain.f. Medical thermometer.

Q3- Correct the following

a- (Constant) variable.b- (Alcohol) mercury.c- (carbon dioxide) Oxygen.d- (A black precipitate) A white precipitate.e- (Nitrogen gas) carbon dioxide gas

Q4- What would happen

a. Heat can’t be insulated.b. Iron (nail) rust will occur due to reaction of iron with O2 in presence of

humidity.c. This will cause a passive effect on the nervous system.

Q5- Write one difference between

a- See book p.72.b- O2 represents 21% of air volume. While N2 represents 78% of air

volume. See book p.38 & 52.c- Answered before P.85.

Exams on the first term

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Exam (4)Q1- Complete the following

a- balance scale, Newton.b- iron, copperc- 35 : 42 Celsius degreesd- photosynthesis, respiratione- 12 pairsf- skull, backbone, ribcage.

Q2- Choose:

1. 122. Cerebellum3. Nitrogen4. Carbon dioxide5. Spring6. copper

Q3- Write the scientific term:

a. Mass.b. Thermometers.c. Carbon dioxided. Ozone.e. Spinal cord.f. Joints.

Q4- Give reason

a- Answered before p.95.b- We can’t control the involuntary processes of the body such as heart

beats and they will be disturbed.c- Because Aluminum is a heat conductor, it allows heat to flow through.

Exams on the first termExam (5)

Q1- Complete the following

a- wood and plastic.

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b- 33 vertebrae.c- 12 pairs, 31 pairsd- wood and plastice- balance scale, spring scalef- dissociation of hydrogen peroxide, manganese dioxide as a catalyst.

Q2- Choose :

1. Carbon dioxide2. Fertilizers3. 100

4. Two cerebral hemi spheres5. Thigh6. oxygen

Q3- Write the scientific term:

a. weight.b. Oxyacetylene flame.c. Nitrogen gas.d. Brain. e. tendons.f. cartilages.

Q4- Compare

a- answered before p.85b- answered before p.85c- answered before p.97

Exams on the first termExam (6)

Q1- Complete the following

1- weight, its mass.2- Clinical, Celsius thermometers.3- respiration of human, respiration of plants and combustion or organic

materials.4- brain, skull5- axial skeleton, appendicular skeleton

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Q2- Write the scientific term:

1. Mass. 2. Heat conductors (good conductors of heat)3. Reflex action

4. Human nervous system5. Atmospheric air

Q3-A- Re-write after correct :

1. (Newton) Kg.2. (Spinal cord) medulla oblongata.3. (Nitrogen peroxide gas) hydrogen peroxide liquid

(water and Nitrogen) water and Oxygen.Q3-B- Problem :

wt on Earth(N) = m(kg) x 10

= 60 x 10 = 600 N

wt on the Moon = 16 x wt on the Earth

= 16 x 600 = 100 N

Q4- Give reason

1. Because it scarcely dissolves in water.2. To maintain our human nervous system healthy.3. Because it doesn’t burn and doesn’t help in burning.4. To protect them.

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