7I Energy And Sustainable Living

Question 1

Global warming theory

Answer 1

The earth is getting warmer and can lead to huge problems such as slowing or starvation

Question 2

What is a fuel

Answer 2

A fuel contains a store of energy

Question 3

What is the law of conservation of energy

Answer 3

Energy can not be created or destroyed only transferred

Question 4

What does non renewable mean

Answer 4

It means they can not be replaced - once they are used they are used

Question 5

What is a biomass fuel obtained from

Answer 5

From plants or from animal waster . As it rots away methane gas is produced . This is the same as natural gas .

Question 6

Example of a biomass fuel

Answer 6

Wood , it is also renewable

Question 7

Examples of energy resources which do not produce carbon dioxide

Answer 7

Nuclear, hydroelectric, solar, geothermal, wind

Question 8

What can we use instead of diesel and name disadvantages of using it

Answer 8

Biodiesel- made from vegetable oil

Not many filling stations with biodiesel

Question 9

Advantages of geothermal power

Answer 9

Clean cheap renewable”e

Question 10

Disadvantages of geothermal power

Answer 10

Only possible in certain parts of the world where hot rocks are near the surface of the earth

Question 11

Advantage of burning fossil fuels

Answer 11

Cheap

Question 12

Disadvantages of burning fossil fuels

Answer 12

Non renewable

Produces carbon dioxide which causes global warming

Question 13

Advantages of nuclear

Answer 13

Does not produce harmful gases

Question 14

Disadvantages of nuclear

Answer 14

Expensive non renewable and produces radioactive substances which cause cancer and are difficult to get rid of.

Question 15

Advantages of solar power

Answer 15

Clean renewable

Question 16

Disadvantages of solar power

Answer 16

No elect city at night or if there is very little sun
Solar panels do not collect a lot of heat energy
Solar cells are expensive and take up a lot of space

Question 17

Advantages of hydroelectric power

Answer 17

Clean renewable

Question 18

Hydroelectric power disadvantages

Answer 18

Reservoirs take up huge amounts of space and destroy the countryside
Only works in wet mountain regions

Question 19

Adavantages of wind

Answer 19

Clean renewable

Question 20

Disadvantages of wind

Answer 20

Not produced if there is put wind
Wind turbines are noisy and many are needed to make sufficient electricity
Some think it spoils the countryside

Question 21

Advantages of wave power

Answer 21

Clean renewable

Question 22

Disadvantages of waves

Answer 22

Doesn’t produce much electricity

Won’t work in calm waters

Question 23

Advantages of tidal

Answer 23

Clean renewable

Question 24

Disadvantages of tidal

Answer 24

Only works on some rivers
Dams can affect wildlife
Tidal generators can affect fish or shipping

Question 25

Advantages of biomass

Answer 25

Renewable

Adds less carbon dioxde then fossil fuels

Question 26

Disadvantages of biomass

Answer 26

Still adds some carbon dioxide

Needs large areas of land to grow crops

Question 27

Unit for measuring energy

Answer 27

Joules most food is measure in kJ

1kj=1000j

Question 28

Where does most energy come from

Answer 28

The sun . Sunlight provides us with the energy plants need to grow . Coal , oil and natural gas are from dead plants and animal remains
Wind is caused by the sun heating up the earth
Clouds form from evapourated water which eventually falls back to earth as rain so hydroelectric

Question 29

Which three energy resources do not depend on the sun

Answer 29

Tidal uses tides caused by the gravity of the moon
Nuclear uses nuclear energy stored in uranium
Geothermal uses heat from underground rocks