P1.4

Question 1

What can be used to drive turbines directly?

Answer 1

Water and wind

Question 2

Name one way electricity can be produced

Answer 2

Suns radiation

Question 3

In some volcanic areas hot water and steam rise to the surface. The steam can be tapped and used to drive turbines. This is known as what?

Answer 3

Geothermal energy

Question 4

Small-scale production of electricity may be useful in some areas and for some uses. Give examples.

Answer 4

hydroelectricity in remote areas

solar cells for roadside signs

Question 5

Using different energy resources has different effects on the environment. Name two of these effects

Answer 5

Any two from-
■ the release of substances into the atmosphere
■ the production of waste materials
■ noise and visual pollution
■ the destruction of wildlife habitats

Question 6

How is electricity distributed to consumers?

Answer 6

Electricity is distributed from power stations to consumers along the national grid

Question 7

For a given power increasing the_______reduces the current required and this reduces the______losses in the cables

Answer 7

1) voltage

2) energy

Question 8

What are the uses of step up & step down transformers?

Answer 8

Step up transformer increases voltage from primary to secondary and a step down transformer does the opposite

Question 9

Give three examples of energy sources

Answer 9

Fossil fuels (coal, oil, gas)
Uranium, plutonium
Biofuels (eg chicken manure)