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1. CairoGovernorate Department : Science
Nozha Directorate of Educatio Form : 5th primary
Nozha Language Schools Revision sheet 2015
Ismailia Road” Branch
Unit (1) : Energy
Lesson 1 : light
1- Complete:-
1- Light travels in ………………………………...
2- ……….. is a darkened area which is formed when light falls on an opaque objects.
3- When the light falls on any object it ………… to our eyes causing vision.
4- We see objects due to …………… of light.
5- When the reflected surface is smooth the reflection is………………
6- The visible white light separated into ……….. colors by using ……..
7- The spectrum color are …………. , ………….. , ………………. , ………………,
…………..,indigo and …………..
2- Give reason for:-
1- The formation of images through narrow holes.
= The formation of shadow .
………………………………………………………………………………………………
………………………………………………………………………………………………
2- Rainbow appears in sky after rainfall.
………………………………………………………………………………………………
………………………………………………………………………………………………
3- We can see the moon lighted at the night.
………………………………………………………………………………………………
………………………………………………………………………………………………
4- The pencil seems broken at the water’s surface
………………………………………………………………………………………………
………………………………………………………………………………………………
3- Put (√) or (X) :-
1- Light is a visible form of energy ( )
2- The nearer object to the light source has the bigger shadow ( )
3- The visible spectrum is the light energy that can’t be seen ( )
4- Red , green and blue are from the spectrum colors . ( )
5- The picture formed in the mirror is inverted . ( )
1

2. Lesson “2”
Seeing Colored Objects
2
1- Complete:-
1- When white light strikes the green grass, the grass absorbs …………. and
reflects ………. Light only.
2- …………. reflects its own light only while ……….. allows its own color only to pass
through .
3- …………… , …………..… and ………..……… are called the secondary colored
light.
4- Mixing ……….…… and ………………. light gives yellow light
2- Write the scientific term :-
1- Materials which allow some light only to pass through it . [……………….….….]
2- The reflection of light in different directions . […………………...…]
3- Put (√) or (X) :-
1- The black board reflects all the light colors ( )
2- The glass prism separates the white light into 10 spectrum ( )
3- The green table reflects all the light colors ( )
2- Give reason for:-
1- The chalk appears white , while the black board appears black
………………………………………………………………………………………………
………………………………………………………………………………………………
2- The red apple seems black when you look at it from a green glass sheet.
………………………………………………………………………………………………
………………………………………………………………………………………………
3- We must wear white clothes in summer.
………………………………………………………………………………………………
………………………………………………………………………………………………
3- What happen when :
1- The white light falls on a prism .
…………………………………………………………………………………….
2- You mix the red , green and blue lights .
………………………………………………………………………………………

3. 4) Complete the following :
1) The colour of the paper is …………….
3
2) ……………..light

4. Lesson “3”
Magnetism
1- Complete:-
1- The magnet has ……….. poles.
2- A magnet has ……… pole and ……… pole
3- Magnets with the same poles will …………………. each other.
4- Magnets with different poles ……….. each other.
5- Each magnet has a space in which its magnetic force appears called ……………
6- The natural magnet is called …………………..
7- From the shapes of man – made magnets …………… , …………… and ……………..
8- ……………………….. is the area of a magnet at which the attraction force is greatest.
10- From the substances that are not attracted to a magnet ……….. , ……….
and ………..
2- Put (√) or (X) :-
1- There is only one type of magnet ( )
2- From the magnetic substances are glass and wood ( )
3- The magnet attracts magnetic and non-magnetic substances ( )
4- The shapes of magnet are bar and horse shoe only ( )
5- North and South poles don’t repel each other. ( )
6- South pole of the compass points to the east direction. ( )
3- What happen? and say why?
1- If you (hang) suspend a magnet to move freely
………………………………………………………………………………………………
………………………………………………………………………………………………
2- If you put a strong magnet close to aluminum bar
………………………………………………………………………………………………
………………………………………………………………………………………………
3-If you approach a north pole of one magnet to a south pole of another magnet
………………………………………………………………………………………………
………………………………………………………………………………………………
4

5. 4-If you scatter some iron filings on a piece of cardboard by a bar magnet
………………………………………………………………………………………………
………………………………………………………………………………………………
5- We approach the north pole of a magnet to the north pole of another suspended
magnet .
………………………………………………………………………………………………
………………………………………………………………………………………………
4- Write scientific term:-
1- The ability of the magnet to attract the magnetic materials. [ ……...……….…..]
2- English doctor made a magnetized needle. [ ……...……….….]
3- The regions of the magnet where the magnetic force is most powerful. [……………….]
4- A set is used for locating the main four directions .
5
S
[…………………...]
5- Give reason:- some materials are called non magnetic materials.
6- Label the following spaces of the attracted magnets:-
N
2
4
3
1

6. Lesson “4”
Magnetism and electricity
1- Complete:-
1- The twisting wire around the wrought iron is made up of ………………….
2- The magnet which is made by the effect of electricity is called …………….
3- …………… and …………… are examples of devices that contains electromagnet.
4- Moving a bar magnet through a coil produce ……………..
5- …………. and ………….. are examples of dynamo
6- A huge electric generator is used in …………….. stations.
7- ………….. changes the electric energy into magnetic energy
8- ………….. is used to lift tons of steel or iron.
9- Electric current has ……………… effect.
6
2- Give reason for:-
1- The magnet which is made by electricity is called electromagnet.
………………………………………………………………………………………………
………………………………………………………………………………………………
2- In dynamo, we use a strong magnet and increase the number of turns in the moving
coils.
………………………………………………………………………………………………
………………………………………………………………………………………………
3- We must increase the number of coil turns in the electromagnet.
………………………………………………………………………………………………
………………………………………………………………………………………………
4- The small cylinder in the bicycle’s dynamo touches the bicycles tires.
………………………………………………………………………………………………
………………………………………………………………………………………………
5- The huge electric generator is used in electric power stations.
………………………………………………………………………………………………
………………………………………………………………………………………………

7. 7
3- Put (√) or (X) :-
1- The electric current has a magnetic effect ( )
2- Electromagnet is used for making electric bells and electric mixers ( )
3- Newton is the scientist who discovered that magnetic energy can be changed into
electric energy ( )
4- The amount of electricity produced from dynamo increases by using weak magnets.( )
5- Dynamo changes the electric energy into kinetic energy ( )
4- How can you increase the produced electric current from dynamo ( Two methods )
1- ………………………….. 2- ……………………………..
5- Write scientific term:-
1- A set used to change the electric energy to magnetic energy. [ ……………………… ]
2- A device that changes the electric energy to kinetic energy. [ ……………………… ]
6- What happen when :
1) Electric current passes through a wire beside a compass .
……………………………………………………………………………………………….
2) The electric current flows through a coil winded ( twisted ) around an iron nail .
……………………………………………………………………………………………….
7- A) Label the diagram :
1) ………………………………………
2) ………………………………………
3) ………………………………………
B) The following diagram represents the …………………………………..

8. Final Revision
on unit ( 1 )
1- Complete :-
1. When the light passes from a glass rod to air , it …………………. .
2. Materials can be classified according to their ability to transmit light
into ………. ,…………and ………………..materials .
3. The basic idea of the electric generator is the changing of …………………energy
into ……………….energy .
4. light rebounding when if falls an object is called ………………….. .
5. Light can easily transmit through ……………… ………….materials .
6. ………………….and ……………….are from the magnetic materials .
7. ……………….and ……………….are the poles of the magnet .
8. Like poles ……………….each other but unlike poles ………………each other .
9. …………………is used in electric bell and to lift tons of steel or iron .
10. Aluminum foil is ………………..material that doesn’t allow light to transmit through
2- Give reason for :-
1. Some materials are called magnetic materials .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
2. Aluminum foil is an opaque material .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
3. A spoon appears broken when it is placed in a cup of water .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
4. Iron , cobalt and nickel are magnetic materials .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
5. We can see objects clearly behind glass sheet .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
8

9. 3- Write the scientific term :-
1. A set is used for locating the main four geographical directions . [ ]
2. It is the light energy that can be seen . [ ]
3. A darkened area formed when light falls on an opaque object . [ ]
4- Compare between :
a) Regular reflection and irregular reflection .
b) Magnetic materials and non magnetic materials .
9
5- Match :
(B) (A)
1- Natural magnet
2- Faraday
3- Light
4- Compass
a) It is a form of energy .
b) It is one of the iron ores .
c) The scientist who discovered that mechanical energy
of the magnet can be changed into electric energy .
d) Used to locate the main four directions .
6- From the opposite figure , answer the following questions :
1- Write the name of parts (a) , (b) .
Part (a) is ……………and part (b) is ……………
2- What happens when we move (b) inside (a)
When we do that , an …………….is generated in the twisted wire ,
and the small light bulls

10. Unit “2”
Lesson “1” : Mixture
1- Write scientific term:-
1- A mixture formed by dissolving salt in water. [……………..]
2- A set that is used to separate water – oil mixture. [……………..]
3- A method used to form salt – pepper mixture. [……………..]
4- Mixture of water , calcium and magnesium. [……………..]
2- Put (√) or (X) :-
1- Sea water is a source for producing table salt ( )
2- Sugar and baking soda are mixtures . ( )
3- Separating funnel is used in separating heterogeneous liquid mixture ( )
4- Salty solution can be formed by shaking or stirring. ( )
5- Solid and liquid materials can be mixed by shaking and grinding. ( )
6- Filtration process is used to separate a mixture which have deposits. ( )
3- Mention one use for each of the following:-
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1- Filter paper:-
……………………………………………………………………………………………
2- Magnet:-
………………………………………………………………………………………………..
3- Boiling:-
………………………………………………………………………………………………..
4- Separating funnel:-
……………………………………………………………………………………..
4- Give reason for:-
1- Air is considered a mixture.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
2- Both sugar and distilled water are considered pure substance .
……………………………………………………………………………………………………
……………………………………………………………………………………………………

11. 3- A magnet can be used to separate iron filing from sand.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- Separating funnel is used to separate a mixture of oil with water .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
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5- Complete:-
1) Air is a ………………… while iron is a …………………
2) ………………is a mixture of water and some minerals such as calcium
………………and ……………… .
3) ……………….. is used to separate a soluble salt from its solution .
4) Mixture is formed by ……………., …………….. , ……………and …………
6- What happen when:-
Heat a salty solution.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
7- How can you separate ?
1- Mixture of chalk and water.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
2- Iron filings and pepper.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
3- Water – oil solution.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- Salt solution
……………………………………………………………………………………………………
……………………………………………………………………………………………………

12. Lesson “2” : Solution
12
1-Complete:-
1- The substance which dissolves in a liquid is called …………..
2- The substance in which the solute dissolves is called ……………
3- The process by which a solute dissolves in a solvent is known as ……………
4- In salty solution , salt is the ………… , while water is the ……………
5- On adding insoluble substances in a certain solvent, ……………. is formed.
6- Solubility process is affected by ……….,…………..,……….and ………..
7- The speed of solubility …………… by increasing stirring process.
2- Choose:-
1- Any solution is composed of ……………..
a. solvent only b. solute only c. solute and solvent
2- ……………. is an example of heterogeneous liquid mixtures.
a. orange juice b. tea c. salty solution
3 - Solubility process depends on …………….
a. temperature b. stirring c. type of solute d. all the previous
4- Mud in water is an example of ……………
a- homogeneous solution b- heterogeneous solution
c- pure substance d- homogeneous mixture
3- Give reason for:-
1- Water is considered a common solvent.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
2- Salt dissolves easily and faster in a large amount of water.
……………………………………………………………………………………………………
……………………………………………………………………………………………………

13. 3- The solubility speed depends on the temperature of the solution components.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- Complete the following table:-
Solution Solute Solvent
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1- tea solution with sugar
2- salty solution
3- baking soda solution
4- lemon juice with sugar
5- Put ( √ ) or ( Х ) and correct the wrong ones :-
a- Water in a sugary solution is the solute ( )
b- Water is the most common solvent ( )
c- The suspension can be separated by using magnetic attraction ( )
d- As stirring increases , the solubility time decrease ( )
e- The components of homogeneous mixture can be distinguished ( )

14. Final Revision
on unit ( 2)
1- Write the scientific term :-
1. A type of mixtures consists of two or more different liquids . [ ]
2. A device used to separate the heterogeneous liquid mixtures . [ ]
3. It is the substance that consists of more than one type of particles . [ ]
2- Compare between :-
Point of comp. Mixtures Pure substances
14
1- Def.
2- Types.
3- Examples.
3I- Give reason for :-
1. The solution is a type of mixtures .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
2. Air is considered a mixture .but baking soda is a pure substance .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
3. Magnet can be used to separate iron filings from sand.
…………………………………………………………………………………………..
…………………………………………………………………………………………..
4- What happens :-
1. Mixing different types of fruit juices together .
……………………………………………………………………………………………..
……………………………………………………………………………………………..

15. Unit "3"
Lesson "1"
Food relation ships among living organisms
15
1-Complete:-
1- Types of food relationships between living organisms includes ………. , ……… and ……..
2- ………….is less common in the plant world than in animal world
3- Plants are ………….. organisms
4- The plants that feed on insects are known as ………….. such as ………..
5- ………….. is relationship where both organisms gets benefit from the other and is not harmed
6- The relation between honeybees and flowers is …………, while that between cat and rat
is …………………
7- ……………. Ejects a black color fluid in the surrounding water when attacked by its enemies.
8- …………….and …………..are from the ways of self defence against predation .
9 - Types of parasitism are …………. and ……………. parasitism .
10- Bilharzia worm parasites on …………….and is named ……………while the harmed
organism that is hurted is called the ………………..
2- Give reason for:-
1- Predation is a temporary relationship
……………………………………………………………………………………………………
……………………………………………………………………………………………………
2- A chameleon can hide from its enemies.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
3- Some bees look like wasps in forming lines on bodies.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- Parasitism relationship differs from the predation relationship.
……………………………………………………………………………………………………
……………………………………………………………………………………………………

16. 5- Some plants are known as insectivorous plants .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
6- The relation between nodular bacteria and leguminous plants is symbiosis mutualism
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relationship .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
3- Mention the kind of food relationship between each of the following:-
1- Cat and rat : ……………………………………………………………………………
2- Bread mold fungus and moist bread : …………………………………………………
3- Lice and man : ……………………………………………………...…………………
4- Jawless lamprey and fish : …………………………………………………………….
5- Crocodiles and some birds : ………………………………………………………….
6- Sponge and tiny aquatic organisms …………………………………………………..
7- Flaria worm and man …………………………………………………………………

17. Lesson"2"
Environmental balance
1-Complete:-
1- ………………….….. it is the balance among the components of the ecosystem
2- Any natural area including living organisms and non- living things is called …………….
3- Ecosystem may be ………….. , ……………. and …………..
2- Put ( √ ) or ( Х ) and correct the wrong ones :-
1- Changing of natural conditions leads to environmental pollution ( )
2- Plants depend completely on the soil to get water ( )
3- Predators organize the numbers of preys population ( )
3- What would happen if :-
1- Trees are cut down
……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
2- There are no predators in the ecosystem.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
3- Preys do not find food and shelter within the ecosystem
……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- Bactria disappear completely from the environment .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
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18. Final Revision
on unit ( 3)
18
1- Compare between :-
1.
P.O.C Predation Parasitism
Definition
Some that occur to the host
Example
2- Give reason for :-
1. The relationship between bee and the flowers is a mutualism .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
2. Plants depend on the soil .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
3. Predation is a temporary relation ship .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
4. Decomposers are considered the guards of nature .
…………………………………………………………………………………………..
…………………………………………………………………………………………..
3- Write the scientific term :-
1. It is the balance among the components of the ecosystem . [ ]
2. It is any natural area inducing living organisms and non
living things . [ ]
3. A food relationship in which one living organism devouring the other one .
[ ]
4- What happen when :
1- Bacteria disappear completely from the environment .
…………………………………………………………………………………………..
…………………………………………………………………………………………..

19. Model exam (1)
Question (1) :-
A) Complete the following :
1. The electric current has a ………………….……. effect .
2. The balance among the components of the ecosystem is called ………………….
3. The substance in which the solids dissolve is called ……………………………..
4. By using a …………….. , the white light can be separated into ………….…. colours .
5. The like poles ……………. each other whereas unlike poles …………………
B) Choose from column (B) what is suitable for column (A) :
(A) ( B)
1. The relation between bread and bread mould fungi is .
2. The relation between two living organisms , one
19
benefits and the other is harmed .
3. The relation between a bee and a flower is .
a) Mutalism .
b) Saprophytism .
c) Parasitism .
Question (2):-
A) Put ( Ö ) or ( × ) and correct the wrong ones :
1. Air and mineral water are example of mixtures . [ ]
2. When the white light falls on a red apple , it reflects the white light .[ ]
3. Saving the natural conditions cause environmental balance . [ ]
4. The electromagnet consists of iron bar , coil and battery . [ ]
5. Aluminium is attracted to the magnet . [ ]
B) Give reason for :
1. The chameleon can hide from its enemies .
………………………………………………………………………………..
………………………………………………………………………………..
2. The formation of shadow .
………………………………………………………………………………..
………………………………………………………………………………..

20. Question (3):-
A) Write the scientific term :
1. A set is used for locating the four main directions . [ …..…………......]
2. A temporary relation ship which ends with devouring the prey. [ ……….…….…..]
3. The apparatus that converts the kinetic energy into electric energy . [ ………………....]
4. A visible form of energy . [ ………………... ]
B) Mention the name of the method or set used to separate the following :
1. Sugar from a sugary solution .
………………………………………………………………………………..
………………………………………………………………………………..
2. Sand and water mixture .
………………………………………………………………………………..
………………………………………………………………………………..
Question (4) :-
A) Choose the correct answer :
1. The time needed for solubility …………… by stirring or increasing the temperature .
a- increases b- decreases
c- doesn’t change d- b and c
2. The plants that prey the tiny insects are known as ………………
a- hosts b- parasites
c- Insectivorous d- decomposers
3. Mud in water is an example of ………………………
a- homogeneous solution b- heterogeneous solution
c- pure substance d- homogeneous mixture
4. ……………….is the magnetic ability to attract the magnetic materials existed in its
field .
a- Magnetic field b- Pole
c- Magnetic material d- Magnetic force
B) What happens if :
1. Bacteria disappear completely .
………………………………………………………………………………..
………………………………………………………………………………..
2. You mix the red , green and blue lights .
………………………………………………………………………………..
………………………………………………………………………………..
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21. Model Exam (2)
21
1st Question :A)Complete the following :
1- Air is a …………………. while iron is a …………..
2- The electromagnet is used in …………………. and …………….. .
3- Electric current has ……………….. effect .
B) What happens when you :
1- Hung a freely magnet .
………………………………………………………………………………….
2- Heat a salty solution .
………………………………………………………………………………….
2nd Question : A) Put ( Ö ) or ( ´ ) and correct the wrong :
1- North and south poles don’t repel each other . [ ]
2- Green salad is considered a mixture . [ ]
3- The south pole of the compass points to the east direction . [ ]
4- Solid and liquid materials can be mixed by shaxing and grinding . [ ]
5- Filteration process is used to separate mixtures which have deposits . [ ]
B) How to increase the produced electric current from dynamo? ( Two methods )
1- ………………………….. 2- ………………………….
3rd Question :
A) Write the scientific term :
1- A set ued to change the electric energy to magnetic energy . [ ………………….]
2- The ability of the magnet to attract the magnet materials . [ ………………….]
3- An english doctor made a magnetized needle . [ ………………….]
4- A mixture of water , calcium and magnesum . [ ………………….]
5- The regions of the magnet where th magnetic force is most powerful .
[ ………………….]

22. 4th Question :A) Choose the correct answer :
1- The natural magnet is one of the iron ores which is known as …………
a- magnetism b- magnetite c- pole d- magnetic
2- Moving a coil between the two poles of a magnet generates ….. energy in the coil .
a- magnetic b- kinetic c- electric d- mechanical
3- The wisting wire around the wrought iron is made up of ……………..
a- copper b- Aluminum c- Iron d- (b) and (c)
22
B) Give reason for :
1- Some materials are called non-magnetic substances .
………………………………………………………………………………….
2- The huge electric generator is used in electric power stations .
………………………………………………………………………………….
5th Question : [ 5 mark ]
A) Label the following spaces of the attracted magnets :-
B) How can you separate ?
1- Mixture of chalk and water solution .
…………………………………………………………………………………………………
…………………………………………………………………………………………………
…………………………………………………………………………………………………
2- Iron fillings and pepper .
…………………………………………………………………………………………………
…………………………………………………………………………………………………
…………………………………………………………………………………………………
3- Water – oil solution .
…………………………………………………………………………………………………
…………………………………………………………………………………………………
…………………………………………………………………………………………………
Good Luck
1
2
4
3

23. Model exam (3)
1st Question :
A) Put ( √ ) or ( × ):-
1- The electric current has a magnetic effect. ( )
2- Lion and elephant are called autotrophic. ( )
3- The white board reflects all the light colors. ( )
4- The filter paper is used to separate oil from water. ( )
5- The predators help us to get rid of the strong members of preys. ( )
B) Choose from column ( B ) what is suitable for column ( A ) :-
( A ) ( B )
23
1- Iron
2- Orange juice
3- Glass
a- is a transparent material
b- is a magnetic substance
c- a heterogeneous mixture
2nd Questions:
A) Complete the following statements:-
1- Air is a ……………..……. of gases such as oxygen and nitrogen.
2- Yellow and …………….…. are from the secondary colors.
3- ……………………..….. is a natural area that includes living and non-living organisms.
4- From factors affecting the dissolving process are …………………
and ……..…………
5- The types of light reflection are ………………… and irregular reflection.
B) Mention one use for :-
1- Compass : ……………………………………………………………………………….
………………………………………………………………………………………………
2- Electromagnet : ………………………………………………………………………….
………………………………………………………………………………………………

24. 24
( 1 )
( 2 )
N
S
3rd Question: A) Choose the correct answer:-
1- The mosquitoes cause ………………….. disease.
a- elephantiasis b- malaria c- small box
2- Object’s shadow is formed because light travels in ………………….. lines.
a- curved b- irregular c- straight
3- Salt and peper can be mixed by ………………….
a- Shaking only b- grinding only c- shaking and grinding
4- ………………. is a common solvent for thousands of substances.
a- Water b- Benzene c- Alcohol
5- ………..……… are the areas of the magnet where the magnetic force is most powerful.
a- Non-magnetic substances b- Magnetic poles c- Magnetic fields
6- From the living organisms that change its color to hide from enemies is ……………….
a- frog b- eagle c- bird
B) Give reason for:-
1- The pencil seems broken at the water surface.
………………………………………………………………………………………………
………………………………………………………………………………………………
2- The bird pick the ticks from the hippo skin.
………………………………………………………………………………………………
………………………………………………………………………………………………
4th Questions : A) Write the scientific term:-
1- A set is used to change the mechanical energy into electric energy.
[…………………………..]
2- It is composed of solute and solvent. […………………………..]
3 - A relationship between two living organisms one of them devours the other.
[…………………………..]
4- It appears at the sky when sun-light passes through water droplets during rain falling.
[…………………………..]
B) What happens if:-
1- You mix the red, green and blue
lights : …………………………………………………………………….………………
………………………………….………………….………………………………………
2- A salty solution is heated : ……………………………………………………………
……………………………………………………………………………………………
C) Label the following spaces of the attracted magnets:-
1) ………………….
2) ………………….

25. Model exam (4)
Question [ 1 ]:
A) Put (√ ) or ( × ) :
1- Red , green and blue are from the spectrum color . ( )
2- The magnetic force of the magnet is most powerful in the middle . ( )
3- The nearer object to the light source has the smaller shadow . ( )
4- Electric current has a magnetic effect . ( )
5- The picture formed in the mirror is inverted . ( )
B) Complete the following statements :
1- On mixing ……………. and …………… lights , a yellow light is formed .
2- …………………….…….. changes the kinetic energy into electric energy .
3- Aluminum foil is ……..…………. material that doesn’t allow the light to transmit
25
through .
4- ………………..….. is used to lift tons of steal or iron .
Question [ 2 ]:
A) Write the scientific term :
1- The Change in the direction of light when it passes through the separating surface
between two transparent media .
[……………………..]
2- A device that used to change the electric energy into magnetic energy .
[……………...………]
3- The reflection of light on a surface in different directions . […………….………..]
4- The space around the magnet in which the effect of the magnetic force appears .
[……………………..]
B) Match from column (B) what is suitable for column (A) :
(B) (A)
1- Natural magnet
2 - Faraday
3- Light
4- Compass
a) It is a form of energy
b) It is one of the iron ores
c) The scientist who discovered that magnetic energy
can be changed into electric energy .
d) Used to locate the four main directions

26. Question [ 3 ]:
A) Correct the underlined words :
1- We can see objects due to separation of light .
2- The green board absorbs all the light that falls on it .
3- The rectangular magnet has 4 poles .
4- Moon is the main source of light on the Earth .
B) What is the name of each of the following :
26
1) …………………………..……
2) ……………….…………………..
C) What happens when :
1- The white light falls on a prism …………………………………………………………
2- We approach the north pole of a magnet to the north pole of another suspended
magnet ……………………………………………………………………………………
Question [ 4 ]:
A) Choose the correct answer :
1- When you look to a red rose through a blue glass sheet , it appears ………………….
a) red b) blue c) black
2- We can get a stronger electromagnet by ……………….. .
a) decreasing the number of coil turns b) decreasing the number of batteries
c) incensing the number of coil turns .
3- The freely suspended magnet points to ……………….. directions .
a) east and west b) north and south c) north and west
4- The coil of the dynamo is made of …………………….
a) carbon b) copper c) graphite
B) Give reason for :
1- The pen looks broken in a glass filled to its half with water .
…………….………………………………………………………………………………
………………………………………………………………………………………………
2- Some materials are called “ Non – magnetic substances ” .
………………………………………………………………………………………………
………………………………………………………………………………………………
C) Complete the following :
The color of the paper is ……………