Physics 1

Question 1

What do we use to measure energy?

Answer 1

Joules, J

Question 2

What is a fuel?

Answer 2

A store of energy that is released when fuel is burned

Question 3

Which energy store is involved in heating or cooling?

Answer 3

Thermal Energy Store

Question 4

Energy Store

Answer 4

When energy is held by an object for a time

Question 5

Which energy store is involved in fuels, food and batteries?

Answer 5

Chemical Energy Store

Question 6

How is energy moved between energy stores?

Answer 6

By energy transfer

Question 7

The law of conservation of energy

Answer 7

Energy can’t be created or destroyed

Question 8

How can we tell which foods are energy rich?

Answer 8

Compare the energy values on food labels

Question 9

What do we call a thousand Joules?

Answer 9

Kilojoules, kJ

Question 10

Which energy store is involved with movement?

Answer 10

Kinetic Energy Store

Question 11

Which energy store is involved when an object is lifted or dropped?

Answer 11

Gravitational Potential energy store

Question 12

Which energy store is involved when something is stretched or squished?

Answer 12

Elastic energy store

Question 13

Name the five main energy stores

Answer 13

Chemical, thermal, kinetic, elastic, gravitational

Question 14

Name the four energy transfers

Answer 14

Transfer by waves, electric current, heat, mechanically

Question 15

Power

Answer 15

A measure of how quickly energy is transferred

Question 16

What is power measure in?

Answer 16

Watts, W

Question 18

What is the equation for the amount of W = J/s

Answer 18

1W = 1J/s

Question 19

The power equation

Answer 19

P= E ÷ T

Question 20

A TV set has a power of 800 watts and o switched on for 30 seconds. Calculate the energy transferred

Answer 20

1. P = E ÷ T
2. E = P x T
3. = 800 x 30
4. = 24,000 J

Question 21

How to convert W to kW

Answer 21

x1000

Question 22

Renewable Resources

Answer 22

Will not run out
eg. Wind, solar, hydroelectric, geothermal, biomass

Question 23

Non-renewable resources

Answer 23

Cannot be replaced, they are finite. Eg. Oil, gas, coal, nuclear

Question 24

Fossil Fuels

Answer 24

Coal, oil, gas

Question 25

Where does the energy in fossil fuels come from?

Answer 25

The sun, fossil fuels are the remains of animals and plants from millions of years ago

Question 26

How do we generate electricity?

Answer 26

Something has to turn a turbine which turns a generator which produces electricity.

Question 27

Where do we get our energy from?

Answer 27

Most comes from the sun, some comes from inside the earth