1.
The energy obtained from sunlight is known as _____ energy
2.
a hard black mineral that is found below the ground and burnt to produce heat
3.
The _____ affects how well solar panels and wind turbines work.
4.
Geothermal energy is heat from inside the _____.
5.
a barrier that is built across a river in order to stop the water from flowing, used especially to make a reservoir or to produce electricity
6.
to turn round and round quickly
