Energy

Question 1

What is energy

Answer 1

The ability to do work or to move something

Question 2

What the SI unit of energy

Answer 2

Joules (j)

Question 3

What does the principal of conservation of energy state

Answer 3

That energy can neither be created nor destroyed but that it can change from one form to another

Question 4

Name examples of stored energy

Answer 4

Potential energy - height or shape
Chemical energy - fuel or a battery
Nuclear energy

Question 5

Name examples of energy in action

Answer 5

Kinetic energy - moving objects

Heat, light, sound, magnetic and electrical energy

Question 6

Name some non-renewable energy

Answer 6

Fossil fuels
Coal
Oil
Gas
Peat

Question 7

Name some renewable sources of energy

Answer 7

Will never be used up
Solar
Hydroelectric 
Wind
Tidal wave
Biomass
Geothermal

Question 8

What is biomass

Answer 8

Chemical energy stored in fast growing plants like trees and oil seed rape.
E.g. Methane

Question 9

What is geothermal energy

Answer 9

Comes from beneath the surface of the earth. Due to radioactive material heating the rocks far below the surface

Question 10

What’s nuclear energy

Answer 10

Energy released from the nuclei of atoms

Question 11

What is nuclear fission

Answer 11

A process used in nuclear power stations in which the nuclei of large atoms are split. Enormous energy is released

Question 12

Where does nuclear fusion occur

Answer 12

In the sun

Light atoms combine to produce enormous amounts of energy

Question 13

When does an energy conservation take place

Answer 13

When energy changes from one form to another. This is usually done to produce a more useful form of energy

Question 14

Name the original source of fossil fuels, oil, gas, turf, and peat
And two advantages and disadvantages

Answer 14

Sun
Advantages 
1) electricity supply is guaranteed 
2) cheap
Disadvantages 
1) limited supply of fuel available
2) will get much dearer as fuel supplies dwindle

Question 15

Name the original source of wind energy

And two advantages and disadvantages

Answer 15

Sun
Advantages
1) never run out
2) no pollution
Disadvantages
1) some people think wind turbines are an ugly site and make noise
2) the wind supply is variable and unreliable, windy sites are essential

Question 16

Name the original source of solar energy

And two advantages and disadvantages

Answer 16

Sun
Advantages 
1)no pollution
2) never run out
Disadvantages 
1) initial costs can be very high
2) spread over a wide area and is difficult to collect

Question 17

Name the original source of hydroelectric energy

And two advantages and disadvantages

Answer 17

Sun 
Advantages 
1) never run out
2) no pollution
Disadvantages 
1) initial costs are very high
2) only a small number of suitable sites

Question 18

Name the original source of wave energy

And two advantages and disadvantages

Answer 18

Sun
Advantages 
1) supply will never run out
2) no pollution 
Disadvantages 
1) can vary with the winds
2) people don't like the turbines

Question 19

Name the original source of tidal energy

And two advantages and disadvantages

Answer 19

Moon and sun
Advantages
1) very reliable and supply will never run out
2) no pollution
Disadvantages
1) damages habitats of birds and other creature that live in river estuaries
2)electricity is generated only at certain times during the day

Question 20

Name the original source of biomass energy

And two advantages and disadvantages

Answer 20

Sun
Advantages
1) supply will be secure and will never run out
2) reduction in greenhouse gas emission
Disadvantages
1) large areas of land are needed to produce enough biomass
2) can cause pollution

Question 21

Name the original source of geothermal energy

And two advantages and disadvantages

Answer 21

Earth
Advantages 
1) no pollution 
2) free supply 
Disadvantages 
1) limited number of suitable sites
2) expensive to drill so deep into the earth

Question 22

Name the original source of nuclear energy

And two advantages and disadvantages

Answer 22

Nuclei in atoms
Advantages
1) huge energy from small amount of fuel
2) produces no acidic gases or carbon dioxide
Disadvantages
1) fission is non-renewable, the uranium or plutonium will not run out
2) radioactive waste is difficult to store safely