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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 . ( )

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Lesson “2” Seeing Colored Objects

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 . ………………………………………………………………………………………

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4) Complete the following :

1) The colour of the paper is …………….

2) ……………..light

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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

………………………………………………………………………………………………

………………………………………………………………………………………………

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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- Give reason:- some materials are called non magnetic materials.

6- Label the following spaces of the attracted magnets:-

N

2

4

3 1

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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.

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.

………………………………………………………………………………………………

………………………………………………………………………………………………

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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 …………………………………..

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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 .

…………………………………………………………………………………………..

…………………………………………………………………………………………..

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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 .

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

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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:- 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 .

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

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

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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 .

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

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

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

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Lesson “2” : Solution

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

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3- The solubility speed depends on the temperature of the solution components. ………………………………………………………………………………………………………………………………………………………………………………………………………… 4- Complete the following table:-

Solution Solute Solvent 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 ( )

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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

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 .

……………………………………………………………………………………………..

……………………………………………………………………………………………..

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Unit "3" Lesson "1"

Food relation ships among living organisms

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

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5- Some plants are known as insectivorous plants . ………………………………………………………………………………………………………………………………………………………………………………………………………… 6- The relation between nodular bacteria and leguminous plants is symbiosis mutualism 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 …………………………………………………………………

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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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Final Revision

on unit ( 3)

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 .

…………………………………………………………………………………………..

…………………………………………………………………………………………..

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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

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 ( √√√√ ) 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 .

………………………………………………………………………………..

………………………………………………………………………………..

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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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Model Exam (2)

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 ( √√√√ ) 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 .

[ ………………….]

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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) 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

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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 )

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 : ………………………………………………………………………….

………………………………………………………………………………………………

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( 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) ………………….

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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

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

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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 : 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 ……………