P2-Solar and Wind power

Question 1

What is passive solar heating?

Answer 1

is when energy from the sun is used to heat something directly

Question 2

what lets heat and light get absorbed into a room?

Answer 2

glass

Question 3

when things that are heated in a room, why can’t they escape through glass?

Answer 3

because they emit infrared radiation which has a longer wavelength meaning it reflects of the glass

Question 4

how do solar water heaters work?

Answer 4

they work like the passive solar heating except they get absorbed by black pipes to heat up the water

Question 5

what causes convection currents to produce wind?

Answer 5

energy from the sun heats the atmosphere

Question 6

what do wind turbines do to create electricity?

Answer 6

they convert the kinetic energy into electricity, the wind turns the blades which turns a generator

Question 7

Advantages of wind turbines…

Answer 7

cheap to run, tough and reliable and wind is free, doesn’t produce polluting waste, its renewable

Question 8

Disadvantages of wind turbines…

Answer 8

you need 1500 turbines to replace one coal-fired power station , spoils the view and noisy, wind sometimes isn’t fast enough, expensive to set up