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G 7 Physics Term 2

Total questions: 105

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

Energy and work are measured in

a)

newtons

b)

joules

c)

hertz

d)

kilograms

2.

Energy cannot be created or destroyed.

a)

True

b)

False

3.

What is Energy?

a)

The ability to do anything

b)

The ability to cause change

c)

The investigation of nature

d)

A fact of life

4.

Total energy will always change in a system of objects.

a)

True; energy is destroyed due to friction

b)

False; energy cannot be destroyed, only transferred.

5.
Heat is a form of _______________.  
a)
movement
b)
energy
c)
melting
6.

What does it mean when we say something is 'a source of energy'? Pick the best definition.

a)

It is something which has energy stored in it which can be used.

b)

By consuming it, it gives us the ability to move.

c)

Another way of saying source of food.

7.

Which of the following are sources of energy?

a)

Sun

b)

Waves

c)

Wind

d)

Coal

e)

All of the options

8.

What source of energy drives external processes such as weather, ocean circulation and erosional processes?

a)

The Moon

b)

The Solar System

c)

The Sun

d)

The Earth's Core

9.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
10.

It is the ultimate source of heat.

a)

The Sun

b)

The Moon

c)

The electricity

d)

The man

11.
The Electrical Energy of the stove is transferred to _____ Energy.
a)
Solar
b)
Thermal
c)
Potential
d)
Electrical
12.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
13.
What type of energy is in this picture?
a)
Kinetic
b)

Elastic Potential

c)

Gravitational Potential

d)
Sound
14.
Which of the following is a fossil fuel?
a)
Wind
b)
Coal
c)
Solar
d)
Biomass
15.
Fossil fuels are classified as nonrenewable because they.......
a)
require expensive equipment
b)
take millions of years to replace
c)
can be found all over 
d)
provide all the energy we use
16.
Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?
a)
chemical → light → electrical
b)
electrical → light → chemical
c)
light → electrical → chemical
d)
chemical → electrical → light
17.

Which is the best example of something that has kinetic energy?

a)

a basketball rolling across a court

b)

a car parked on a steep hill

c)

a picture hanging on the wall

d)

a piece of wood before it's burned

18.
Which kind of energy change occurs when a candle is burning?
a)
Chemical to light.
b)
Light to electrical.
c)
Solar to heat.
d)
Chemical to electrical.
19.
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?
a)
chemical → light → electrical
b)
mechanical → sound → light
c)
thermal → solar → electrical
d)
electrical → thermal → light
20.
The picture shows a light bulb attached to a hand generator. What energy transformation occurs as the handle of the generator is turned?
a)
thermal → solar → light
b)
solar → light → electrical
c)
mechanical → electrical → light
d)
electrical → mechanical → light
21.

The law of Conservation of energy states that energy can be transformed from one form to another, but it cannot be _______ or ________

a)

transformed, or created

b)

divided or multiplied

c)

radiated or conducted

d)

created or destroyed

22.

What is this diagram called?

a)

Stankey Diagram

b)

Sankey Diagram

c)

Sankay Diagram

d)

Samkay Diagram

23.
Where does most of the energy go in this transformation.
a)
Electrical energy
b)
Light
c)
Heat
d)
other
24.
Where does most of the energy go for this transformation.
a)
heat
b)
electrical
c)
light
d)
joules
25.
What type of device might this Sankey be about?
a)
A very efficient LED light bulb
b)
A very inefficient incandescent light bulb
c)
A coal power plant
d)
A wind turbine
26.

Gravitational Potential Energy is held by any object

a)

at rest

b)

in motion

c)

having momentum

d)

having inertia

27.

Which passenger has the most potential energy?

a)

A

b)

B

c)

C

d)

D

28.
At which point is kinetic energy greatest? 
a)
W
b)
X
c)
Y
d)
Z
29.

At what point does the high jumper have the greatest amount of potential energy?

a)

While running towards the high jump

b)

At the top of the poles during the jump

c)

When landing on the mat after the jump

d)

Halfway up the poles during the jump

30.
At what position does the rock have the greatest kinetic energy?
a)
A
b)
B
c)
D
d)
E
31.

The Kinetic Energy of the pendulum increases the most between which points

a)

A and B

b)

A and E

c)

A and C

d)

A and D

32.

The measurement of potential energy of an object that is stretched or compressed, is what?

a)

Gravitational Potential Energy

b)

Potential Energy

c)

Elastic Potential Energy

d)

Kinetic energy

33.

A stretched rubber band represents what type of potential energy?

a)

gravitational potential energy

b)

elastic potential energy

c)

chemical potential energy

d)

kinetic potential energy

34.

Which object has elastic potential energy?

a)

a hanging leaf

b)

a burning coal

c)

a rolling ball

d)

a stretched bow

35.

This type of potential energy can be found in rubber bands and springs.

a)

Chemical

b)

Elastic

c)

Gravitational

36.
Each day, at the same time of day, I measure the plant's height and record it in my chart.  What variable am I recording?
a)
Independent Variable
b)
Dependent Variable
c)
Constant
d)
Control
37.

. It is a systematic method of asking and answering scientific questions by making observations and doing experiments.

a)

Scientific Method                

b)

Formulation of Hypothesis

c)

  Experiment

d)

.Drawing Conclusions

38.

It is an educated guess. The possible answers to your questions or solutions to your problem in your study.

a)

Experiment    

b)

Scientific Method

c)

 Research

d)

Hypothesis

39.

It is the test for the hypothesis. It is composed of systematic process of explaining a phenomenon using cause and effect relationships

a)

Experiment    

b)

Conclusion     

c)

 Research

d)

Hypothesis

40.

These are characteristics, traits, and factors that are observed during the conduct or scientific investigations.     

a)

Variables       

b)

Variants

c)

Matter

d)

None of the above

41.

A prediction or statement that can be tested is _____.

a)

a conclusion

b)

an observation

c)

a control

d)

a hypothesis

42.

A research hypothesis includes the original hypothesis, a method of testing is, and a(n) _____ that supports the hypothesis

a)

analysis

b)

prediction

c)

observation

d)

conclusion

43.

The variable being measured is the _____.

a)

dependent variable

b)

independent variable

c)

control

d)

constant

44.

Why do scientists conduct controlled experiments?

a)

looking for answers

b)

trying to support hypotheses

c)

collecting data

d)

all of the above

45.

Which of the following is a factor in an experiment that does not change?

a)

control

b)

conclusion

c)

constant

d)

prediction

46.

Which bulb is the most efficient?

a)

Filament bulb

b)

LED light

c)

CFL lamp

47.

The energy efficiency shown in this diagram is:

a)

About 10%.

b)

About 30%.

c)

About 60%.

d)

Impossible to tell.

48.

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

a)

100%

b)

7%

c)

93%

d)

95%

49.

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

a)

5%

b)

50%

c)

55%

d)

100%

50.

A hairdryer uses 300J of energy to produce 60J of sound energy and 240J of thermal energy. Calculate it's efficiency.

a)

80%

b)

90%

c)

20%

d)

100%

51.

What is temperature measured in?

a)

Degrees

b)

Centimeters (cm)

c)

Inches (in)

d)

None of the above

52.

Heat energy can be transferred.

a)

True

b)

False

53.

What tool is used to measure temperature?

a)

A ruler

b)

A scale

c)

A compass

d)

A thermometer

54.
Heat is the movement of ______.
a)
radiation
b)
thermal energy
c)
cold
d)
fire
55.
Thermal energy ALWAYS moves from _____ to _____.
a)
solid to liquid
b)
ice to water
c)
hot to cold
d)
solid to gas
56.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
57.

Conduction requires

a)

Electricity

b)

the electromagnetic spectrum and particles

c)

air or water flow

d)

direct contact

58.

If you walk barefoot on hot asphalt, energy is transferred by which process?

a)

Convection

b)

Radiation

c)

Conduction

d)

Reflection

59.

The following diagram shows water in contact with an ice cube and warmer air.

Which way will energy flow?

a)

From the air to the water

b)

From the water to the air

c)

From the ice cube to the air

d)

From the ice cube to the water

60.

......is a bad conductor of heat

a)

copper

b)

iron

c)

plastic

d)

Aluminium

61.

In a liquid, the main method of thermal energy transfer is ....

a)

conduction

b)

convection

c)

radiation

62.

Convection is a process through which thermal energy is transferred ________.

a)

through the collisions of adjacent particles

b)

through electromagnetic radiation

c)

through movement of the medium

63.

When heated, warmer fluids _________.

a)

increase volume, become less dense and rise.

b)

decrease volume, become more dense and sink.

c)

don't change.

64.

When cooled, fluids _________.

a)

increase volume, become less dense and rise.

b)

decrease volume, become more dense and sink.

c)

don't change.

65.

Where should air-con be placed to ensure maximum cooling effect for a room?

a)

on the floor

b)

near the ceiling

c)

at eye level

d)

at waist level

66.

What kind of heat transfer is occurring when the sun warms the sand?

a)

Conduction

b)

Convection

c)

Radiation

d)

Density

67.

The baby chickens kept warm from a heat lamps demonstrates this type of heat transfer. 

a)

conduction

b)

radiation

c)

convection

d)

density

68.

 

A group of friends gather around a fire to stay warm.

What type or energy is?

a)

conduction

b)

radiation

c)

convection

d)

waves

(sun)

69.

Transfer of thermal energy through "space" how is it's call?

a)

conduction

b)

convection

c)

radiation

d)

density

70.

Heat transferred over a distance, without the use of matter:

a)

Conduction

b)

Convection

c)

Radiation

d)

Evaporation

71.

Evaporation happens

a)

throughout the liquid

b)

at the surface of a liquid

72.

What effect does Evaporation cause ?

a)

Heating Effect

b)

Magnetic Effect

c)

Cooling Effect

d)

Warming Effect

73.

What happens when a liquid perfume is sprayed on your palm ?

a)

The liquid gain heat from the sanitizer and evaporate

b)

The liquid gain heat from the surroundings and evaporate

c)

The liquid gain heat from the palm and evaporate

d)

The liquid gain heat from the palm or surroundings and evaporate

74.

At what temperature does evaporation take place?

a)

Freezing point

b)

Above melting point

c)

Below boiling point

d)

At heating point

75.

Evaporation occurs at the surface while boiling takes place all through a liquid

a)

True

b)

False

76.

How are fossil fuels formed?

a)

Over a decade of years, out of the decay of organisms.

b)

Over millions of years, out of the decay of rocks.

c)

Over millions of years, out of the decay of organisms.

d)

Fossil fuels are a myth

77.

What makes renewable energy sources renewable?

a)

It will eventually finish

b)

They use resources that can be replaced in a short time

c)

They use resources that are cheap

d)

Renewable energy is a myth

78.

Which of the following energy sources is shown in the picture?

a)

wind

b)

tidal

c)

nuclear

d)

solar

79.

Which of the following is an example of a natural resource?

a)

trees

b)

plastic

c)

gasoline

d)

bronze

80.

Which of the following is the best definition of a natural resource?

a)

Something that is found in nature. It is made by humans.

b)

Something that is found in nature. It's not made by humans, but it is used by humans to make other things.

c)

Something that is found in nature and made by humans, and it takes millions of years to be replaced.

d)

Something that is found in nature. It is used by humans, and it can be replaced very quickly.

81.

How Fossil

Fuels are used?

a)

Fossil fuels are used to power electrical machines

b)

Fossil fuels are used to help the earth

c)

Fossil fuels are used to get concrete

d)

Fossil fuels are used to pollute the earth

82.

Natural gas and petroleum were both formed _____.

a)

in swamp lands.

b)

under ancient seas.

c)

on the surface of the oceans.

d)

underground.

83.

What conditions do fossil fuels have to be in to form?

a)

Heat, Pressure, Time

b)

Heat, Time

c)

Pressure

d)

I don't know

84.

What happens to fossil fuels to create electricity?

a)

They are stored

b)

They are burned

c)

They are melted

d)

They are frozen

85.

This fossil fuel has been created by the remains of plants and must be mined from deep within the Earth.

a)

oil

b)

coal

c)

natural gas

d)

solar

86.
The renewable energy resources are…
a)
Geothermal, wave, wind, solar, tidal, HEP, Biofuels
b)
Coal, OIl, Gas, Nuclear
c)
Powerstations
d)
Step-up and step-down transformers
87.
The non-renewable energy resources are…
a)
Geothermal, wave, wind, solar, tidal, HEP, Biofuels
b)
Coal, OIl, Gas, Nuclear
c)
Powerstations
d)
Step-up and step-down transformers
88.

What do we call the device which produces electricity in a power station?

a)

turbine

b)

condenser

c)

generator

d)

transformer

89.

What turns the turbine in a thermal power station?

a)

hamsters

b)

water

c)

air

d)

steam

90.

Nuclear power stations release carbon dioxide.

a)

True

b)

False

91.

One of these is renewable. Which one?

a)

Geothermal

b)

Coal

92.

Solar isn't reliable because ....

a)

...it's not always sunny

b)

...the sun will run out one day

c)

...it releases carbon dioxide

d)

...it isn't sunny in England

93.
Geothermal Power is made from 
a)
pumping water into the earth to create steam that powers a turbine
b)
smashing rocks into little bits to make oil
c)
the sun
d)
burning leftover potatoes
94.

Which of the below is an example of renewable energy?

a)

Oil

b)

Coal

c)

Solar

95.
What characteristic do all renewable resources share?
a)
Produced by waste products
b)
Form underground from dead organisms.
c)
Replaced in a short period of time
d)
Allow energy to pass through them easily
96.
The energy resource that is most affected by change in weather is_____________?
a)
geothermal 
b)
wind
c)
nuclear
d)
natural gas
97.

What kind of energy

resources ?

a)

Geothermal

b)

Tidal

c)

wind

d)

Biofuels

98.

What is a wind farm?

a)

A farm that uses windpower

b)

Wind turbines grouped together in an area

c)

A plant that produces energy to move wind turbines

d)

A farm that produces wind

99.

What is a disadvantage of wind turbines?

a)

They pollute the air.

b)

They do not pollute

c)

They produce noise and may harm some animals

d)

They are "green" energy

100.

Wave and tidal energy harvesting system emits zero greenhouse gas emissions during its operation.

a)

True

b)

False

101.

Which of the below is an advantage of solar cells

a)

It is noisy

b)

No pollution

c)

Only works when sunny

d)

Does not work at night time

102.

Bio-fuel and geothermal energy are examples of?

a)

Non-renewable energy resources

b)

Hydro energy

c)

Renewable energy resources

d)

None of the above

103.

Which is the most commonly used energy source today?

a)

fossil fuels

b)

hydrielectric

c)

nuclear

d)

solar

104.

Hot water is pumped up from deep inside Earth . This describes....

a)

geothermal energy

b)

hydroelectric energy

c)

bio fuels

d)

chemical processes

105.

Choose the energy that is described below.

Flowing water turns a wheel to do work to make electricity.

a)

WInd

b)

Solar

c)

Hydropower (water)

d)

Biomass

e)

Human power.

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