Chapter 7.3 -science

Question 1

Turbines

Answer 1

Turbines: wheels that, when turned, drive electrical generators. Steam or water are often used to turn turbines.

Question 2

Wind energy

Answer 2

Wind energy: a renewable energy derived from the wind (caused by uneven heating of the Earth and its oceans by the sun), for example by the use of wind turbines in a wind farm

Question 3

Biomass:

Answer 3

material produced by living organisms

Question 4

Ocean wave energy:

Answer 4

Ocean wave energy: a renewable energy created by converting the mechanical energy of ocean waves to electrical energy

Question 5

Tidal energy

Answer 5

Tidal energy: a renewable energy that can be harvested from the tides in the ocean through the use of large underwater turbines placed in areas of high tidal movement

Question 6

Geothermal:

Answer 6

Geothermal energy: heat energy transferred from rocks below the Earth’s surface

Question 7

Hydro-electric

Answer 7

Hydro-electric: power produced by the energy of falling water

Question 8

Nuclear energy:

Answer 8

Nuclear energy: the energy stored at the centre of atoms, the tiny particles that make up all substances. Nuclear energy can be released from the radioactive metals uranium or plutonium and transformed into electrical energy in a nuclear power station