Quiz about Junior Cert Physics: Energy Conversions

Question 1

What is the energy conversion when you plug in a stereo and listen to music?

Accepted Answer

electrical to sound

Answer

electrical to mechanical

Answer

chemical to heat

Answer

potential to sound

Question 2

What is the energy conversion when you burn wood for a fire?

Accepted Answer

chemical to thermal

Answer

electrical to thermal

Answer

light to kinetic

Answer

chemical to electrical

Question 3

What is the energy conversion when you put batteries in a flashlight to make it turn on?

Accepted Answer

chemical to light

Answer

light to kinetic

Answer

chemical to thermal

Answer

nuclear to light

Question 4

What is the energy conversion when you plug in a charger to charge a battery?

Accepted Answer

electrical to chemical

Answer

electrical to light

Answer

kinetic to potential

Answer

thermal to chemical

Question 5

What is the energy conversion when you have a skateboard at the top of the hill then move down?

Accepted Answer

potential to kinetic

Answer

kinetic to potential

Answer

potential to thermal

Answer

electrical to kinetic

Question 6

What is the energy conversion when a wind turbine turns to provide energy to a power grid?

Accepted Answer

kinetic to electrical

Answer

electrical to potential

Answer

potential to kinetic

Answer

nuclear to heat

Question 7

What is the energy conversion when you feel the warmth of the sun?

Accepted Answer

nuclear to thermal

Answer

nuclear to kinetic

Answer

potential to nuclear

Answer

light to nuclear

Question 8

What is the energy conversion when you plug in a fan?

Accepted Answer

electrical to kinetic

Answer

potential to kinetic

Answer

potential to heat

Answer

heat to electrical

Question 9

What is the energy conversion when you eat food for fuel to go for a run?

Accepted Answer

chemical to kinetic

Answer

chemical to nuclear

Answer

kinetic to chemical

Answer

potential to chemical

Question 10

What is the energy conversion when photosynthesis takes place as the sun makes a plant grow?

Accepted Answer

light to chemical

Answer

thermal to chemical

Answer

potential to nuclear

Answer

chemical to potential

Question 11

What is the energy conversion when you burn charcoal to cook food on a grill?

Accepted Answer

chemical to thermal

Answer

thermal to chemical

Answer

light to kinetic

Answer

chemical to nuclear

Question 12

What is the energy conversion when you use gasoline to make a car move?

Accepted Answer

chemical to kinetic

Answer

chemical to potential

Answer

potential to light

Answer

nuclear to kinetic

Question 13

What is the energy conversion when water moves over a dam to power a city's energy grid?

Accepted Answer

kinetic to electrical

Answer

electrical to chemical

Answer

nuclear to electrical

Answer

kinetic to potential

Question 14

What are the energy conversions when the sun shines on a solar panel that provides energy to a home?

Accepted Answer

nuclear to light to electrical

Answer

nuclear to heat to electrical

Answer

nuclear to electrical to light

Answer

nuclear to light to potential

Question 15

Which of these objects converts light to chemical energy?

Accepted Answer

C. corn

Answer

A. ethanol plant

Answer

B. light bulb

Answer

D. solar cell

Question 16

What is electrical energy converted to inside a toaster?

Accepted Answer

thermal energy and light

Answer

nuclear energy

Answer

chemical energy

Answer

kinetic energy

Question 17

What do wind turbines, hydroelectric dams, and ethanol plants have in common?

Accepted Answer

All use generators to produce electrical current.

Answer

All produce electrical current without pollution.

Answer

All convert gravitational potential energy to electrical current.

Answer

All convert thermal energy to electrical current.

Question 18

The following is a possible energy conversion path:

Sun - Solar Panels - Toaster

Accepted Answer

True

Answer

Flase

Question 19

Where does a chicken get its energy?

Accepted Answer

from its food in the form of chemical energy

Answer

directly from the Sun in the form of solar energy

Answer

from running around in the form of kinetic energy

Answer

from flying up tp the roof of a barn in the form of potential energy

Question 20

Which of the following is stored energy that exists based on the position of an object?

Accepted Answer

gravitational potential energy

Answer

chemical energy

Answer

thermal energy

Answer

kinetic energy

Question 21

Fossil fuels _______________________________. That means there is a limited supply. Once the world runs out, there is no way to get more.

Accepted Answer

are non-renewable resources

Answer

are clean-burning

Answer

came to Earth on comets

Answer

are found in fossilized sea shells

Question 22

Which of the following is the cleanest way to produce electricity?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 23

Where on the track does the roller coaster train have the greatest potential energy?

Accepted Answer

Point 1

Answer

Point 2

Answer

Point 3

Answer

Point 4

Answer

Point 5

Question 24

Which energy transformation below occurs in a blow dryer?

Accepted Answer

electrical ----> thermal

Answer

electrical -----> chemical

Answer

chemical -----> thermal

Answer

thermal ------> electrical

Question 25

Which is an example of potential energy?

Accepted Answer

A person is sitting on a horse.

Answer

A child is hopping down the sidewalk.

Answer

A horse is galloping in a field.

Answer

A car is driving on the street.

Question 26

What kind of energy is represented in the picture?

Accepted Answer

Chemical

Answer

Thermal

Answer

Sound

Answer

Nuclear

Question 27

High temperature is connected to:

Accepted Answer

High kinetic energy.

Answer

Low kinetic energy.

Answer

Zero net energy.

Answer

Equal kinetic energies.

Question 28

What is electrical energy converted into when a drill is used?

Accepted Answer

All of the above

Answer

Kinetic energy

Answer

Sound

Answer

Heat

Question 29

What is the efficiency of a solar cell if 1000 J of solar energy hits the cell and 200 J are converted into electrical energy?

Accepted Answer

20%

Answer

10%

Answer

30%

Answer

40%

Question 30

What is energy?

Accepted Answer

The ability to do work.

Answer

moving energy

Answer

stored energy

Answer

renewable energy

Question 31

The unit of work is

Accepted Answer

joule

Answer

watt

Answer

hertz

Answer

pascal

Question 32

Rank in order, from largest to smallest, the gravitational potential energies of the balls.

Accepted Answer

3 > 2 = 4 > 1

Answer

1 > 2 = 4 > 3

Answer

1 > 2 > 3 > 4

Answer

3 > 2 > 4 > 1

Question 33

One form of energy can sometimes change into more than one other energy form.

Accepted Answer

True

Answer

False

Question 34

As a skateboarder travels up a half-pipe, how does his energy change?

Accepted Answer

His kinetic energy changes into potential energy.

Answer

His potential energy changes into kinetic energy.

Answer

His chemical energy changes into kinetic energy.

Answer

His thermal energy changes into potential energy.

Question 35

Your body changes chemical energy from food into which forms of energy?

Accepted Answer

mechanical (move muscles)

Accepted Answer

thermal (body temperature)

Accepted Answer

electrical (brain)

Answer

nuclear (energy)

Question 36

Which fossil fuel is created from the remains of dead plants and forms into a "rock?"

Accepted Answer

Coal

Answer

Petroleum

Answer

Natural Gas

Answer

Nuclear Energy

Question 37

What raw materials are needed for respiration?

Accepted Answer

Glucose (sugar) and oxygen

Answer

Water and carbon dioxide

Answer

Glucose (sugar) and carbon dioxide

Answer

Water and oxygen

Question 38

What raw materials are needed for photosynthesis?

Accepted Answer

Water and carbon dioxide

Answer

Glucose (sugar) and oxygen

Answer

Water and oxygen

Answer

Glucose (sugar) and carbon dioxide

Question 39

Where does most of the energy go in this transformation.

Accepted Answer

Heat

Answer

Electrical energy

Answer

Light

Answer

other

Question 40

What type of device might this Sankey be about?

Accepted Answer

A very inefficient incandescent light bulb

Answer

A very efficient LED light bulb

Answer

A coal power plant

Answer

A wind turbine

Question 41

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

Accepted Answer

50%

Answer

5%

Answer

55%

Answer

100%

Question 42

What is this diagram called?

Accepted Answer

Sankey Diagram

Answer

Stankey Diagram

Answer

Sankay Diagram

Answer

Samkay Diagram

Question 43

The energy efficiency shown in this diagram is:

Accepted Answer

About 60%.

Answer

About 10%.

Answer

About 30%.

Answer

Impossible to tell.

Question 44

How much energy is lost as heat energy in the Sankey diagram shown?

Accepted Answer

90 J

Answer

110 J

Answer

100 J

Answer

10 J

Junior Cert Physics: Energy Conversions

45 questions

What is the energy conversion when you plug in a stereo and listen to music?

What is the energy conversion when you burn wood for a fire?

What is the energy conversion when you put batteries in a flashlight to make it turn on?

What is the energy conversion when you plug in a charger to charge a battery?

What is the energy conversion when you have a skateboard at the top of the hill then move down?

What is the energy conversion when a wind turbine turns to provide energy to a power grid?

What is the energy conversion when you feel the warmth of the sun?

What is the energy conversion when you plug in a fan?

What is the energy conversion when you eat food for fuel to go for a run?

What is the energy conversion when photosynthesis takes place as the sun makes a plant grow?

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