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.
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