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Questions of grade four second term 
Q1 Put ( N )or(X ): 


The weight of the car effects on its speed. 
After car collision, the air bag deflated as speed as it inflated 


The high-speed moving objects face less danger than the slower 
objectives. 


The driver should drive as fast as possible to avoid accidents. 
Mars is located a few meters away from Earth. 


There is energy loss when energy is transformed from one form to 
another. 


Energy cannot be transformed from one form to another. 
Most of energy chains start with the moon. 
Both electric bulb and electric heater produce thermal energy. 


When pedaling a bike, the chemical energy in your body change to 
kinetic energy. 


There is a stored chemical energy inside the food we eat. 
The produced sound energy helps the hair dryer to do its function. 


The energy chain of a burning candle is : chemical energy 
converted into thermal energy & light energy 
Mars Curiosity can be operated from a distance. 


As the speed of the car increases, the amount of used fuel 
decreases. 


Biofuel is one of non-renewable resources of energy. 


The sun is the primary source of forming both biofuel and fossil 
fuel. 


The movement of a generator in electric power station produces 


19, 
20. 


21: 


22; 


23. 
24. 
25. 


26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
34. 
35. 


36. 


37. 


potential energy. 
Acid rain causes soil and water pollution. 


When burning of fossil fuel increases, the temperature on Earth 
decreases. 


Windmills can do their job all the time as the wind never stops 
blowing. 


Both modern wind turbines and old windmills are used to generate 


electricity. 


Looking directly at the sun is very dangerous. 


Electricity generated by wind turbines is transmitted through wind. 


The flow of water can be controlled to generate electricity in dams. 


Turbines convert kinetic energy into electrical energy. 
Mixing of water with oxygen gas produces carbonic acid. 

The power source for the electric fan is wind. 

Plants need sunlight to grow. 

We use solar energy to preserve food. 

Electricity generated from water is called hydroelectricity. 
Rivers store kinetic energy. 

The sun is made of hydrogen and oxygen gases. 

Solar panels consist of a lot of plant cells. 

Water is one of the sources of electricity production in Egypt. 


The electricity produced by water is known as electromagnetic 
energy. 


The energy produced when operating the gas oven is electrical 
energy. 


( 


( 


( 


( 
( 


Q2 Write the scientific term of the following: 


L. 


17. 


18. 


The process in which two objects or more crash into each 
other and includes an energy transfer. 


A liquid that stores the chemical energy and it is 
extracted from the fuel to move the car 

Safety equipment used to prevent car passengers from 
moving forward when the car stops suddenly. 

Safety equipment used to provide soft cushion when it is 
inflated automatically with a gas during a collision of 
cars. 

A heavy steel ball that swings on a cable and it is used in 
destruction of parts of buildings. 

The form of energy that is stored in battery of a remote 
control. 

The wasted energy of a computer. 


A robot vehicle that can be controlled from a distance 
and is used to explore the surface of mars 
The energy produced from playing the guitar. 


A device used to convert electrical energy into light 
energy. 


. The energy produced when the wood of trees is burned. 


Energy can neither be created nor destroyed, but only 
converted from one form to another. 


. A kind of energy that is produced from the electrical 


heater and burning coal. 
The energy that is produced from the blender and helps it 
in doing its job. 


. The main sources of energy for most forms of energies on 


Earth. 


. Itis any substances which produces thermal energy on 


burning. 

Natural resources of energy that takes a very long period 
of time to be formed. 

It is a type of fossil fuel that is produced from dead 
marine animals. 


19. Itis a form of fossil fuel, which can be made from some (eenma reana ) 
types of plants such as grass and wood chips. 


20. Itis a phenomenon in which the Earth's temperature (eee ) 
increases, when carbon dioxide gas increases in air. 

21. The energy resources that include wind energy and water (............... ) 
energy. 

22. The device in electric power station that turns kinetic EEEE ) 
energy into electrical energy. 

23. A panel designed to absorb the sun energy to produce heat (............6.. ) 
or generate electricity. 

24. Huge bodies in space made mostly of hydrogen and ENE ) 
helium gases. 

25. An energy that is generated from windmills and is (oee ) 
transmitted through wires to houses and factors. 

26. A type of electrical energy generated by water turbines (oee ) 
in dams. 

27. A build on the river that controls the flow of water and Can eee: ) 


increases the potential energy of water. 


Q3:Choose from column (B) what suits it in column (A) 


1- 


A B 
1-The object's mass. a-It affects the kinetic energy of a 
2-The object’s height from the earth’s moving object not on its potential 
surface. energy. 
3-The velocity of a moving object. b- It affects the kinetic energy and the 
4-On the Earth’s surface, potential energy of the object. 
c-When it decreases, the kinetic energy 
increases. 


d-When it increases, the stored 
potential energy increases. 
e-the potential energy equals zero. 


l- The sun a- It is operated by electricity. 
2- Benzene b- Its light energy changes into 
3- The fan chemical energy in plants. 
c- It is a liquid that can be used as 
a fuel for cars. 


3- 
A B 
1-Water a- It needs extreme heat and 
2-Coal pressure to be formed from 
3-The sun remains of dead plants. 
b- It is the main resource of energy 
on the Erath’s surface. 
c- It is a liquid renewable resource 
of energy. 
4. 
A B 
1- Coal a- Solar energy 
2- Water b- Non-renewable energy source 
3- Wind turbine output c- Electrical energy 
d- Renewable energy source 
5- 
A B 
1. Solar panels a- use in cooking food by converting solar 
energy into heat energy. 
2. Curved mirrors b- It was used to grind grain. 
3. Windmills c- use to generate electricity from solar 
energy 
d- Convert kinetic energy into electrical 
energy. 


Turbines 
Greenhouse 


Windmills 


A 


. Law of 


conservation of 
energy 
Airbag 


. Coal 


A 
The sun 
Coal 


Pressure and 
temperature 


A 


B 
a- It was used to grind grain 
b- Convert kinetic energy into electrical 
energy 


C- It helps to grow crops that only grow in 
warm climates 
d- Non-renewable energy source 
B 


a- From the safety devices inside the cars 


b- Non-renewable energy source 

c- Energy does not destroy), but 
transforms from one form to another 

d- renewable energy source 


a- from non-renewable energy sources. 
b- From Factors affecting the formation 
of fossil fuels. 


C- The main energy source on the Earth's 
surface. 

d- Converting wind energy into electrical 
energy. 


Renewable energy a- Converting wind energy into electrical 


energy. 


2- Curved mirrors 


3- Wind turbines 


10- 


A 
1. Natural gas 
2. Wind turbines 


3. Law of 
conservation of 
energy 


11- 


A 
1- Solar heaters 


2- Turbines 


3- Greenhouse 


A 
1- Fossil fuels 
2- Solar Panels 
3- Turn off appliances 
and lights when 
Being outside the 
home 


b- Energy that does not run out with our 
consumption of it. 

c- Directs sunlight to heat and cook food. 

d- The main source of energy on the Earth's 
surface. 


B 
a- Convert kinetic wind energy into electricity 
b- The main source of energy on the Earth's 
surface 
c- Anon-renewable energy source 


T 


Energy does not destroy, but transforms 
from one form to another 


B 
a- It helps to grow crops that only grow in 
warm climates 
b- Water is heated using the energy of the 
sun. 
c- Convert kinetic energy into electrical energy 
d- from renewable energy sources 


B 
a- One of the ways to conserve fossil fuels. 
b- A non-renewable energy source. 
c- Converting solar energy into electricity. 


d- Source of renewable energy. 


13- 


A B 
1- Energy a- solar energy 
2- Solar heaters b- Energy does not destroy, but transforms 


from one form to another 


3- Solar panel input c- It is used to heat water using the energy of 


the sun 
d- It is used to convert thermal energy into 
electrical energy 


Q4 Complete the following: 


1. 


10. 


11. 


As a result of hitting the ball with the bat, the direction of the ball will 


During a car crash, the ......... is inflated with a gas to provide a soft 
cushion. 


Engineers go to reduce the weight of the solar vehicles to increase its 


The speed of .......... vehicles is slower than that of normal vehicles and 
ee vehicles. 
When the mass of a moving object decreases its kinetic energy ............ at 


the same speed. 

To operate an electric mixer, we USE ............. energy. 

The energy can be........... from one form to another. 

In any energy chain, some of the energy is lost in the form of ........... 


The energy that is produced from the battery and used to operate a toy 


Cal iS eeen energy. 
The electric lamp converts ........ energy into light and heat energy. 
In electric heater, .......... energy is considered as an input energy , while 


12. 


13. 


14. 


15. 


16. 


17. 


18. 


19. 


20. 


21. 


22. 


23. 


24. 


25. 


thermal energy is considered as .......... energy. 


The mobile phone converts chemical energy stored in its batteries into 


nae energy and............. energy. 
When you ride a bicycle, the ........ energy stored in your body is 
converted into .......... energy which causes the bicycle to move. 


The energies that are produced from the washing machine are 
hee energy and.............energy. 


On Mars planet, Curiosity robot can be operated for a long period of 
time by using .......... energy from sunlight that is converted into 
eee energy used to recharge its batteries. 


Coal and ma can be used in electric power stations to generate 
electricity. 


We can use some forms of fuel such as .......... ANG wakes in warming 
houses. 


ae is example of biofuel, while ...............is example of fossil fuel. 


Turbines in electric power stations are turned by steam and they 


produce ......... energy to run the......... of the electric power stations. 
The electric generator changes .......... energy into ............ energy. 
Global warming is a phenomenon that raises the .......... of Earth and 
change its ...........6 

To avoid air pollution, we must use ......... resources of energy such as 
water. 

The sun is a star which is mostly made up of ....... gas and ....... gas. 
We can use solar energy in cooking by using curved .......... which collect 
and focus ........ onto metal pots to heat them. 

In some villages, solar panels are used to generate........ energy that is 
used to operate ......... equipment. 


26. 


27. 


28. 


When the wind turbines rotate, .............. energy is converted into 
eae energy. 

Renewable energy resources include ........... AlaGly sence 

Both wind and water movement produce ........ energy that is used to 
rotate turbines to generate ........ energy 


Q5 Complete the write answer between brackets: 


1. 


2. 


3. 


14. 
15. 


. The produced ...... 


. When apiece of coal is burnt, 


When the car stops suddenly, the passengers move 
When objects crash with each other, then 

ae transfers between them. 

The big truck needs .... Engine. 


When the car fuel completely runs out, then the 
es becomes zero. 


In a battery of a toy car ........... energy changes 
into electrical energy. 
Curiosity rover is designed to explore ......... 


Electric wires are made of ............. 


When you use the hand ball, the ....energy 
changed into sound energy. 


. When you turn on a light bulb, the electrical 


energy travels through .......... until reaching the 
bulb. 


. Both hair dryer and electric water kettle produce 


E energy. 
energy doesn't help the blender 
do its job. 

A Energy is 
produced. 
The car needs 


To keep playing with the toy car, we have to 
ET, the batteries. 


10 


(Forward - 
backward) 
(Distance - energy) 


(Big - small) 
(Mass - speed) 
(Mass - color ) 


( chemical — sound 


) 

(Mars planet — The 
Moon) 

( wood — copper) 


(electrical — 


kinetic) 
( plastic — wires ) 


(thermal - light) 
(sound - kinetic) 
(Potential - 


thermal) 
(fuel - water ) 


(replace- heat) 


16. 


17. 


18. 


19. 


20. 


21. 


22. 


23. 


24. 
25. 


26. 


27. 


28. 


29. 


30. 


31. 


32. 


33. 


34. 


35: 
36. 


All the following are found deeply under earth's 
surface except ...... 

Coal is a type of fuel, which is used in all the 
following purposes except ........... 

Ancient people use ......... as a form of fuel before 
discovering gasoline. 

ee is considered as the main resource of 
energy on Earth's surface. 

Hydroelectric energy is generated from ......... 


Acid rain is formed when .......... combines with 
rain water. 
Cars smog causes irritation of ...... of human. 
Both modern wind turbines and old windmills 


are similar in their..... 
An example of the renewable energy is ............ 


Using curved ......... in cooking food is one of the 
benefits of using the solar energy. 

When wind ......... energy increases, the windmill 
blades spin faster. 

In water turbines, the ........ energy of water is 
changed into electrical energy. 

The form of energy resulted from waterfalls is 
called ...... energy. 

Modern wind turbines are................. the old 
vacuum mills 

The power source for the electric fan is 


The sun’s energy is produced from a gaseous 
reaction. 


11 


(coal - green plant) 


( warming houses - 
operating TV) 
( wind - wood ) 


(The sun - 
Natural gas) 

( biofuel and fossil 
fuel - waterfalls 
and dams ) 
(oxygen - carbon 
dioxide ) 

( the small intestine 
- the eye ) 

( blades number — 
function ) 

(oil — wind ) 


( mirrors - wood) 


(chemical - 
kinetic ) 
(kinetic - light ) 


(solar - 
hydroelectric) 

( longer than - 
shorter than ) 

( wind- electricity) 


( food preservation 
- cooking food ) 

( photo — 
electricity) 

( wind — water ) 


( The sun — planets 


(coal — wind ) 


( Hydrogen and 
Helium- Nitrogen 


and Helium) 


37. The electric heater transforms energy......... into (Radio— 
heat energy electricity) 
38. One of the disadvantages of wind energy is that it (High cost - does 
CE iret eee ay Une Lae ree y, not blow 
sometimes) 
6: 


A. Answer the following questions 


1 - Mention some of the safety equipment in the car? 





Figure 1 Figure 2. 
2- What is the name of input energy to this type of turbines? 


C. What happens if.....? 


1- The mass of a moving object increases when it moves downward along 
a ramp. (according to its kinetic energy). 

2- Two bicycles move in an opposite direction, collide with each other. 

3- Your hand is approached to lighting electric lamp. 

4- The remains of marine were buried under the Erath’s surface over 
millions of years. 


D. From the opposite figure: 


12 





a- What is the name of this device? 
b- The change of energy from......... energy to iiscscsactoscens energy . 


Q7: Choose the correct answer:- 


1. 


A plugged-in lamp can turn _ energy to energy. 
a. electrical; light b- electrical; light 
d. chemical; light d. chemical; heat 


As energy transforms from one form to another, some of it is often 
lost as: 


..... 


a. light b. heat 
c. sound d. movement 

3- The airbag helps to........... - 
a-Reduce the speed of a person’s b-Increase the speed of a 
movement forward. person’s movement forward. 
c-Reduce the speed of a person's d-Increase the speed of the 
movement backwards. person's movement 

backwards. 

The airbag is made of ..........c seen 
a-Carton b- Nylon 
c-Rubber d-cloth 
All the following are found deeply under the Erath’s surface, except 
a-natural gas b- coal 
c- green plants d- oil 


EEA is considered as the main resource of energy on the Erath’s 
surface. 

a-Gasoline b- the sun 

c-Natural gas d- the moon. 


13 


Questions of grade four second term 


Q1 Put (V) or (X ye 


The weight of the car effects on its speed. 
After car collision, the air bag deflated as speed as it inflated 


The high-speed moving objects face less danger than the slower 
objectives. 


The driver should drive as fast as possible to avoid accidents. 
Mars is located a few meters away from Earth. 


There is energy loss when energy is transformed from one form to 
another. 


Energy cannot be transformed from one form to another. 
Most of energy chains start with the moon. 
Both electric bulb and electric heater produce thermal energy. 


When pedaling a bike, the chemical energy in your body change to 
kinetic energy. 


There is a stored chemical energy inside the food we eat. 
The produced sound energy helps the hair dryer to do its function. 


The energy chain of a burning candle is : chemical energy 
converted into thermal energy & light energy 
Mars Curiosity can be operated from a distance. 


As the speed of the car increases, the amount of used fuel 
decreases. 


Biofuel is one of non-renewable resources of energy. 


The sun is the primary source of forming both biofuel and fossil 
fuel. 


The movement of a generator in electric power station produces 


V) 
v 


(X) 


(X) 
(x) 
(Vv) 


X) 
(X) 
V) 
V) 


(Vv) 
(x) 
V) 


V) 
(x) 


(X) 
V) 


(X) 


19. 
20. 


zi, 


22; 


23. 
24. 
23: 


26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
34. 
35. 
36. 


37. 


potential energy. 
Acid rain causes soil and water pollution. 


When burning of fossil fuel increases, the temperature on Earth 
decreases. 


Windmills can do their job all the time as the wind never stops 
blowing. 


Both modern wind turbines and old windmills are used to generate 
electricity. 


Looking directly at the sun is very dangerous. 


Electricity generated by wind turbines is transmitted through wind. 


The flow of water can be controlled to generate electricity in dams. 


Turbines convert kinetic energy into electrical energy. 
Mixing of water with oxygen gas produces carbonic acid. 

The power source for the electric fan is wind. 

Plants need sunlight to grow. 

We use solar energy to preserve food. 

Electricity generated from water is called hydroelectricity. 
Rivers store kinetic energy. 

The sun is made of hydrogen and oxygen gases. 

Solar panels consist of a lot of plant cells. 

Water is one of the sources of electricity production in Egypt. 


The electricity produced by water is known as electromagnetic 
energy. 


The energy produced when operating the gas oven is electrical 
energy. 


(V) 
(x) 


(x) 
(Vv) 


(V 
(X) 
V 


(x) 
(x) 
(x) 
(V) 
(x) 
(V) 
(x) 
(Xx) 
(x) 
(VW) 
(x) 


(x) 


QO2 Write the scientific term of the following: 


L. 


17. 


18. 


ollision 


The process in which two objects or more crash into each ¢ nerd 
other and includes an energy transfer. 


A liquid that stores the chemical energy and it is gasoline (oil ) 
extracted from the fuel to move the car 
seat bejt 


Safety equipment used to prevent car passengers from (NWS 


moving forward when the car stops suddenly. ° 

Safety equipment used to provide soft cushion when it is airbag, 
inflated automatically with a gas during a collision of 

cars. 


A heavy steel ball that swings on a cable and it is used inwrecking ball 


destruction of parts of buildings. h e | 
The form of energy that is stored in battery of a remote Q. A emica 
control. 


The wasted energy of a computer. thermal] 


A robot vehicle that can be controlled from a distance MAC. rOY ET. curiosity 
and is used to explore the surface of mars 


The energy produced from playing the guitar. (sound) 
A device used to convert electrical energy into light electrical bulb 
energy. 

. The energy produced when the wood of trees is burned. thermal] 


Energy can neither be created nor destroyed, but only Caer Pert ) 


converted from one form to another. law of conseryation of energy 
m 


. A kind of energy that is produced from the electrical t er 


heater and burning coal. ° ° 
The energy that is produced from the blender and helps it kinetic 
in doing its job. 


. The main sources of energy for most forms of energies on (... sun. .) 


Earth. 

It is any substances which produces thermal energy on (a: fuel 5) 

burning. 

Natural resources of energy that takes a very long period nen renewable 
of time to be formed. 


It is a type of fossil fuel that is produced from dead oil ‘natural gas 


marine animals. 


liquid bio fuel 


19. It is a form of fossil fuel, which can be made from some (ethanol 
types of plants such as grass and wood chips. ° 
global warming 


20. It is a phenomenon in which the Earth's temperature SIYQA YYA 


increases, when carbon dioxide gas increases in air. 

21. The energy resources that include wind energy and water renewable 
energy. 

22. The device in electric power station that turns kinetic generato r 


energy into electrical energy. 
23. A panel designed to absorb the sun energy to produce heaSQlar panels 


or generate electricity. 


24. Huge bodies in space made mostly of hydrogen and (Ga stars .) 
helium gases. J t ° J 
25. An energy that is generated from windmills and is Q eci Tica 


transmitted through wires to houses and factors. hydroelectricity 


26. A type of electrical energy generated by water turbines” = (.............. 
in dams. 

27. A build on the river that controls the flow of water and (. dams. .) 
increases the potential energy of water. 


Q3:Choose from column (B) what suits it in column (A) 


1- 


A B 
1-The object's mass. a-It affects the kinetic energy of a 
2- The object's height from the earth's moving object not on its potential 
surface. energy. 
3-The velocity of a moving object. b- It affects the kinetic energy and the 
4-On the Earth’s surface, potential energy of the object. 
c-When it decreases, the kinetic energy 
increases. 


d-When it increases, the stored 
potential energy increases. 
e-the potential energy equals zero. 


2-d 3-a 4-e 


1- The sun a- It is operated by electricity. 
2- Benzene b- Its light energy changes into 
3- The fan chemical energy in plants. 
c- It is a liquid that can be used as 
a fuel for cars. 


1-b 2-C 3-a 


3. 
A B 
1-Water a- It needs extreme heat and 
2-Coal pressure to be formed from 
3-The sun remains of dead plants. 
b- It is the main resource of energy 
on the Erath’s surface. 
c- It is a liquid renewable resource 
of energy. 
1-c 2-a 3- b 
4- 
A B 
1- Coal a- Solar energy 
2- Water b- Non-renewable energy source 
3- Wind turbine output c- Electrical energy 
d- Renewable energy source 
1-b 2-d 3- c 
5- 
A B 
1. Solar panels a- use in cooking food by converting solar 
energy into heat energy. 
2. Curved mirrors b- It was used to grind grain. 
3. Windmills c- use to generate electricity from solar 
energy 
d- Convert kinetic energy into electrical 
energy. 


1-c 2-a 3-b 


6- 
A 


1- Turbines 
2- Greenhouse 


3- Windmills 


1-b 


A 
1. Law of 


conservation of 


energy 
2. Airbag 
3. Coal 


l-c 


3- Pressure and 
temperature 


l-c 


B 
a- It was used to grind grain 


b- Convert kinetic energy into electrical 
energy 


c- It helps to grow crops that only grow in 
warm climates 
d- Non-renewable energy source 


2-c 3-a 


B 
a- From the safety devices inside the cars 


b- Non-renewable energy source 


c- Energy does not destroy), but 


transforms from one form to another 
d- renewable energy source 


2-a 3- b 


a- from non-renewable energy sources. 
b- From Factors affecting the formation 
of fossil fuels. 


c- The main energy source on the Earth's 
surface. 

d- Converting wind energy into electrical 
energy. 


2-a 3-b 


9. 


A 


1- Renewable energy a- Converting wind energy into electrical 


2- Curved mirrors 


3- Wind turbines 


1-b 
10- 


A 
1. Natural gas 
2. Wind turbines 


3. Law of 


conservation of 
energy 


l-c 


11- 
A 
1- Solar heaters 


2- Turbines 


3- Greenhouse 


1-b 


energy. 

b- Energy that does not run out with our 
consumption of it. 

c- Directs sunlight to heat and cook food. 

d- The main source of energy on the Earth's 


surface. 
2-c 3-a 


B 
a- Convert kinetic wind energy into electricity 


b- The main source of energy on the Earth's 
surface 


c- A non-renewable energy source 


d- Energy does not destroy, but transforms 
from one form to another 


2-a 3-d 


B 


a- It helps to grow crops that only grow in 
warm climates 


b- Water is heated using the energy of the 
sun. 


c- Convert kinetic energy into electrical energy 
d- from renewable energy sources 


2-C 3-a 


12- 


A 
1- Fossil fuels 
2- Solar Panels 
3- Turn off appliances 
and lights when 
Being outside the 
home 


B 
a- One of the ways to conserve fossil fuels. 
b- A non-renewable energy source. 
c- Converting solar energy into electricity. 


d- Source of renewable energy. 


1-b 2-c 3-a 


13- 
A 
1- Energy 


2- Solar heaters 


3- Solar panel input 


a- solar energy 

b- Energy does not destroy, but transforms 
from one form to another 

c- It is used to heat water using the energy of 
the sun 

d- It is used to convert thermal energy into 
electrical energy 


1-b 2-c 3-a 


O4 Complete the following: 


1. Asa result of hitting the ball with the bat, the direction of the ball will 
change.in the opposite direction 


2. 


During a car crash, air bag inflated with a gas to provide a soft 
cushion. 
Engineers go to reduce the weight of the solar vehicles to increase its 
speed 
The spee ofSOla K ehicles is slower than that of normal vehicles and 
electrical, 

decreases 
When the mass of a moving object decreases its kinetic energy ........... at 
the same speed. 

electrical 
To operate an electric mixer, we use ............. energy. 
change /transform 

The energy can be........... from one form to another. 

thermal 


10. 


11. 


In any energy chain, some of the energy is lost in the form of ........... 


a 


The Bey all> produced from the battery and used to operate a toy 
ectric 
IRIS eS: energ 


electrical — 
The electric lamp converts......... energy into light and heat energy. 


electrical 
In electric heater,.......... energy is considered as an input energy , while 


: output 
thermal energy is considered as.......... energy. 


12. The mobile prona Ws chemical energy stored in its batteries into 
sound ight 


TT energy and......2..... energy. 


l l chemical l 
13. When you ride a,bicycle, the ....... energy stored in your body is 


converted into MEU fergy which causes the bicycle to move. 


14., The energies that are produced from the washing machine are 
a energy ands... nergy. 


15. On Mars planet, Curiosity robot can be operated for a long period of 
time b usin Ot Alenergy from sunlight that is converted into 


electrica nergy used to recharge its batteries. 


16. Coal and „oil can be used in electric power stations to generate 
electricity. 


17. We can use some forms of fuel such ,scoal,,jwood, warming 


houses. 


wood / charcoal / ethanol oil / coal / natural gas 
i > Yana a. is example of biofuel, while.............. is example of fossil fuel. 


20. The electric generator changesinetig, orgy neg lectrical | 


E _ temperature 
21. Global warming is a phenomenon that raises the ......... of Earth and 


sae . renewable 
22. To avoid air pollution, we must use ......... resources of energy such as 


water. 


helium hydrogen 
23. The sun is a star which is mostly made up of ....... gas and....... gas. 


l l l mirrors 
24. We night energy in cooking by using curved.......... which collect 
lis 


an aren raç Aa a Sot Rea them. 
25. In some villages, solar panels are used to genegigctrical, that is 


used to opel kr gA NAb ment. 


26. When the wind turbines rotate KiNetig, ergy is converted into 


electricalene rgy. 


rotate turbines to sabe} aee eE ener y 
electrica 


5 Complete the write answer between brackets: 





1. When the car stops suddenly, the passengers move |(Forward 





Peas backward 

2. When objects crash with each other, then (Distance 
eee transfers between them. 

3. The big truck needs .... Engine. small) 

4. When the car fuel completely runs out, then the (Mass 
canst. becomes zero. 

5. Kinetic energy doesn't affect by the .......... (Mass 

6. Ina battery of a toy car ............... energy changes chemical}- sound 
into electrical energy. 

7. Curiosity rover is designed to explore ......... The 

vioon 

8. Electric wires are made of ............. ( wood 

9. When you use the hand ball, the ....energy (electrical — 
changed into sound energy. 

10. When you turn on a light bulb, the electrical Plastic 
energy travels through.............. until reaching the 
bulb. 

11. Both hair dryer and electric water kettle produce (thermal 4 light) 
eee ee energy. 

12. The produced ...... energy doesn't help the blender kinetic) 
do its job. 

13. When a piece of coal is burnt,.............. 
produced. 

14 The car needs... to move. 

15. To keep playing with the toy car, we have to [@eplace} heat) 


Lene een the batteries. 


10 


16. 


17. 


18. 


19. 


20. 


21. 


22. 


23. 


24. 
25. 


26. 


27. 


28. 


29. 


30. 


31. 


32. 


33. 


34. 


35. 
36. 


All the following are found deeply under earth's (coal { green plant) 


surface except ...... 


Coal is a type of fuel, which is used in all the warming houses - 
following purposes except ........... 
Ancient people use ......... as a form of fuel before ( wind -[wood] 
discovering gasoline. 


T is considered as the main resource of The sun 
Natural gas) 


energy on Earth's surface. 


Hydroelectric energy is generated from ......... ( biofuel and fossil 
fuel - 
rand dams 
Acid rain is formed when............. combines with (oxygen - 
rain water. 
Cars smog causes irritation of ...... of human. e small intestine 





[ieee] 
Both modern wind turbines and old windmills blades number — 
are similar in their..... 


An example of the renewable energy is ............ (oil 


Using curved ......... in cooking food is one of the wood) 


benefits of using the solar energy. 











When wind ......... energy increases, the windmill _ (chemical - 
blades spin faster. 


In water turbines, the........... energy of water is 
changed into electrical energy. 

The form of energy resulted from waterfalls is 
called ...... energy. 

Modern wind turbines are. ............... the old 
vacuum mills 

The power source for the electric fan is 


light ) 





The source of all energies on earth is planets 
Examples of renewable energy sources. ............... (coal 
The sun’s energy is produced from a gaseous Hydrogen and 


reaction. Helium- Nitrogen 


11 


and Helium) 


37. The electric heater transforms energy......... into Radio — 
heat energy 
38. One of the disadvantages of wind energy is that it High cost 





6: 
A. Answer the following questions 


1 - Mention some of the te a in the car? 


eereerr rrr ereerny «> PEeeerrr reer ererere ree rrerrerer rer err errr errr reer err eee ee 


2works on starting the air bag inflating process in case of accidents. Sensor 


B- 


1- Which one of them generates the electric energy is higher? 





Figure 1 Figure 2. 
2- What is the name of input energy to this type of turbines? 
figure 2 because it.has fewer number.of.blades that increase the rotation 
and the efficiency 


C. What happens if......? 


1- The mass of a moving object increases when it moves downward along 
a ramp. (according to its kinetic energy). 

2- Two bicycles move in an opposite direction, collide with each other. 

3- Your hand is approached to lighting electric lamp. 

3- The remains of marine were buried under the Erath’s surface over 
millions of years. 


12 


1-the kinetic energy will increase . 


2- the two bicycles will make a strong Collison and will cause 
more damage to each other . 

or it will collide in a forceful way causing more damage and 
the kinetic energy transfer between the two bicycles 


3- I will feel warm. 


4- it will turn into oil or natural gas in the extreme heat and 


13 


D. From the opposite figure: 
solar panels 


a- What is the name of this device? 


electrical 





b- The change of energy from SO. AR nergy lO eiior energy 


Q7: Choose the correct answ 


1: 





A plugged-in lamp can turn energy to energy. 
a. electrical; light b- electrical; light 
d. chemical; light d. chemical; heat 


As energy transforms from one form to another, some of it is often 
lost as: 


c. sound d. movement 


b-Increase the speed of a 
person’s movement forward 


c-Reduce the speed of a person's d-Increase the speed of the 
movement backwards. person's movement 
backwards. 


The airbag is made Of ............cceseceeees 


a-Carton b- Nylon 


c-Rubber d-clot 
All the following are found deeply under the Erath’s surface, except 
a-1 il ga b- coal 





- green plants d- oil 


T, is considered as the main resource of energy on the Erath’s 


surface. 
a-Gasoline 
c-Natural gas d- the moon. 


14