This document contains a revision sheet for a 5th grade primary science class covering lessons on light, seeing colored objects, magnetism, and the relationship between magnetism and electricity. The sheet includes incomplete statements to fill in, questions to answer with explanations, and true/false questions to mark with a check or X. Topics covered include light reflection, refraction, the electromagnetic spectrum, color absorption and reflection, magnetic poles, electromagnets, dynamos, and generators.

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:-
10
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 .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
11
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
13
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
16
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 .
……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
17

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 .
………………………………………………………………………………..
………………………………………………………………………………..
20

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 ……………