Energy Year 9

Question 1

What is a system?

Answer 1

An object or a group of objects

Question 2

What happens when a system changes?

Answer 2

The way in which its energy is stored changes

Question 3

What is power?

Answer 3

Rate at which energy is transferred/work is done

Question 4

What does power equal?

Answer 4

Work done or energy transferred over time

Question 5

What is the unit of power?

Answer 5

Watts

Question 6

What is the unit of energy?

Answer 6

Joules

Question 7

What can energy be?

Answer 7

Transferred, stored or dissipated

Question 8

What can energy not be?

Answer 8

Created or destroyed

Question 9

What does efficiency equal?

Answer 9

Useful power output/total power input

Question 10

Name 3 ways energy efficiency can be increased

Answer 10

Lubrication to reduce energy wasted as heat, use more efficient devices like LED bulbs, used streamlined shapes to improve energy transfer pathway

Question 11

Name the main energy resources

Answer 11

Fossil fuels, nuclear fuel, biomass, wind, hydroelectric, geothermal, wave/tidal and solar

Question 12

What is a renewable energy source?

Answer 12

Energy source that can be replenished as it is used

Question 13

Are fossil fuels renewable or non-renewable?

Answer 13

Non-renewable

Question 14

Is nuclear fuel renewable or non-renewable?

Answer 14

Non-renewable

Question 15

Is biomass fuel renewable or non-renewable?

Answer 15

Renewable

Question 16

Is wind energy renewable or non-renewable?

Answer 16

Renewable

Question 17

Is hydroelectric energy renewable or non-renewable?

Answer 17

Renewable

Question 18

Is geothermal energy renewable or non-renewable?

Answer 18

Renewable

Question 19

Is tidal energy renewable or non-renewable?

Answer 19

Renewable

Question 20

Is wind energy renewable or non-renewable?

Answer 20

Renewable

Question 21

Name uses of fossil fuels

Answer 21

Coal, used to generate electricity, oil, used to make fuels like petrol, natural gas, used to heat homes

Question 22

Name uses of nuclear fuel

Answer 22

Electricity generation in nuclear power stations, medical applications like treating cancer in radiotherapy

Question 23

Name uses of biomass fuel

Answer 23

Electricity generation in power stations by burning of biomass fuels, heating homes through burning wood

Question 24

Name uses of wind energy

Answer 24

Electricity generation through wind turbines to convert kinetic to electrical energy, pumping water in remote areas using wind-powered pumps

Question 25

Name uses of hydroelectric energy

Answer 25

Electricity generation in hydroelectric power stations where turbines turn to produce electricity, pumped storage to store energy

Question 26

Name uses of geothermal energy

Answer 26

Electricity generation using steam from underground to turn turbines, heating buildings using underground heat

Question 27

Name uses of tidal energy

Answer 27

Electricity generation by using underwater turbines to turn water movement into electricity, pumped-storage systems

Question 28

Name uses of wave energy

Answer 28

Electricity generation by using water movement to drive generators, powering remote equipment like navigation buoys

Question 29

Name uses of solar energy

Answer 29

Electricity generation by using solar panels to convert sunlight to electricity, heating water using solar thermal panels

Question 30

Which energy sources are reliable and why?

Answer 30

Nuclear fuel as it has a constant output, hydroelectric energy as water levels can be steady, tidal energy as tides happen regularly

Question 31

Which energy sources are unreliable and why?

Answer 31

Wind energy as wind doesn't always blow, solar energy as isn't always sunny, wave energy as it depends on sea conditions, biomass depends on supply

Question 32

What is the environmental impact of fossil fuels?

Answer 32

When fossil fuels are burnt harmful gases like sulfur dioxide are released, causing air pollution

Question 33

What is the environmental impact of nuclear energy?

Answer 33

Nuclear power produces radioactive waste that must be stored safely for thousands of years

Question 34

What is the environmental impact of wind energy?

Answer 34

Turbines produce noise that disturb locals and spoil natural appearance of landscape

Question 35

What is the environmental impact of solar energy?

Answer 35

Large solar farms take up lots of land and disturb natural habitats

Question 36

What is the environmental impact of hydroelectric energy?

Answer 36

Buildings dams flood and destroy large areas, including habitats for plants and animals

Question 37

What is the environmental impact of biomass fuel?

Answer 37

Burning biomass releases pollutants like carbon dioxide into the air

Question 38

What is the environmental impact of geothermal energy?

Answer 38

Drilling geothermal wells can disturb local landscapes and habitats

Question 39

What is the environmental impact of tidal energy?

Answer 39

Tidal turbines can block or harm sea creatures

Question 40

What is the environmental impact of wave energy?

Answer 40

Wave energy devices can affect habitats of marine animals

Question 41

Are fossil fuels sustainable?

Answer 41

No

Question 42

Is nuclear energy sustainable?

Answer 42

No

Question 43

Is wind energy sustainable?

Answer 43

Yes

Question 44

Is solar energy sustainable?

Answer 44

Yes

Question 45

Is hydroelectric energy sustainable?

Answer 45

Yes

Question 46

Is biomass fuel sustainable?

Answer 46

Yes

Question 47

Is geothermal energy sustainable?

Answer 47

Yes

Question 48

Is wave energy sustainable?

Answer 48

Yes

Question 49

Is tidal energy sustainable?

Answer 49

Yes

Question 50

What is the formula for electrical power?

Answer 50

Current x Voltage

Question 51

What is the unit of electrical power?

Answer 51

Watts

Question 52

What is the unit of current?

Answer 52

Amperes

Question 53

What is current?

Answer 53

Flow of electrical charge

Question 54

What is voltage?

Answer 54

Energy transferred per unit charge across a component

Question 55

What is the unit of voltage?

Answer 55

`54QVolts

Question 56

What is the formula of electrical energy?

Answer 56

Current x Voltage x Time

Question 56

What is the equal of watts?

Answer 56

Joules per second

Question 57

What is the formula of electrical energy?

Answer 57

Kilowatts per hour = Kilowatts x Hours