P3.3 Power from the sun and the earth Flashcards
1
Q
what are solar cells used for
A
generating electricity
2
Q
2 negatives to solar cells
A
- very expensive
- need plenty of sunshine
- lots of them are needed
3
Q
what are solar heating panels used for
A
used to heat water
4
Q
How do solar heating panels work
A
- solar heating panels use the suns energy to heat water directly
- thousands of flat mirrors to reflect sunlight onto a big water tank
5
Q
where does geothermal energy come from
A
energy transferred by radioactive substances deep inside earth
6
Q
how does geothermal energy work
A
water pumped into hot rocks underground produce steam to drive turbines at the earths surface that generate electricity
7
Q
disadvantages to geothermal
A
location specific, expensive
