Energy

Question 1

What is work?

Answer 1

A transfer of energy from one form to another.

Question 2

What is power?

Answer 2

The rate of energy transfer/

Question 3

What is kinetic energy?

Answer 3

Energy associated with movement.

Question 4

What is potential energy?

Answer 4

Stored energy that could produce movement, if transferred.

Question 5

What is the unit for energy?

Answer 5

Joule (J)

Question 6

What is the unit for power?

Answer 6

Watt (W)

Question 7

What is the unit for mass?

Answer 7

Kilogram (kg)

Question 8

What is unit for time?

Answer 8

Second (s)

Question 9

What is the energy transfer in a plant?

Answer 9

Light -> Chemical

Question 10

What is the energy transfer in a car moving up a hill at constant speed?

Answer 10

Chemical -> Kinetic

Question 11

What is the energy transfer of a car rolling down a hill?

Answer 11

Gpe -> Kinetic

Question 12

What are three marking points for a Sankey diagram?

Answer 12

Arrows that show input and output energies.

Correct labelling of arrows.

Correct relative size of arrows.

Question 13

What is the equation for power?

Answer 13

Power = Work Done / Time

Question 14

What does P stand for?

Answer 14

Power

Question 15

What does t stand for?

Answer 15

time

Question 16

What does W stand for?

Answer 16

Work done

Question 17

Which fuels are fossil fuels?

Answer 17

Oil, Gas, Coal

Question 18

What are the advantages of fossil fuels?

Answer 18

High energy density, Reliable energy source that is independent of weather conditions

Question 19

What are the advantages of renewable energy sources, like solar and wind?

Answer 19

Do not release greenhouse gases, so do not contribute to global warming.

Are renewable.

Question 20

What is the energy transfer in an accelerating car?

Answer 20

Chemical to kinetic

Question 21

What is the energy transfer in a solar panel?

Answer 21

Light to electrical

Question 22

What are the disadvantages of fossil fuels?

Answer 22

Release greenhouse gases, contributing to global warming.

Not renewable; will eventually run out.

Question 23

What are the disadvantages of renewable energy sources, like solar and wind?

Answer 23

Not reliable (vary with weather and time of day)

Usually need to be built in a specific location.

Question 24

What are the advantages of nuclear power?

Answer 24

Very high energy density.

Do not release greenhouse gases and contribute to global warming.

Question 25

What are the disadvantages of nuclear power?

Answer 25

Produces radioactive waste with a long half life.

High decommissioning costs.