chapter 3

Question 1

energy resources

Answer 1

large stores of energy that can be used to generate electricity

Question 2

renewable energy

Answer 2

an energy resource that is replenished at a faster rate than the rate that is being used

Question 3

non-renewable energy

Answer 3

an energy resource which is being used faster than the rate that it is being replenished

Question 4

step up transformer

Answer 4

increase in potential difference and increase in current

Question 5

step down transformer

Answer 5

decrease the potential difference and increase the current

Question 6

carbon dioxide

Answer 6

greenhouse gas produced during combustion

Question 7

greenhouse gases

Answer 7

contribute to golbal warming

Question 8

greenhouse effect

Answer 8

trapping of the suns energy in a planets lower atmosphere occurs naturally but can be increased artificially

Question 9

global warming

Answer 9

the gradual increase in the planets mean temp

Question 10

climate change

Answer 10

the change in average weather over a long period of timee

Question 11

examples of renewable energy

Answer 11

geothermal
hydroelectric
solar
tidal
wave
biofuel
wind

Question 12

examples of non renewable energy

Answer 12

gas
oil
coal
nuclear