Geothermal and Solar Energy

How inefficient are modern Solar cells

• 50%

• 70%

• 30%

• 5%

What are the TWO main uses for Solar power

• Heating Water for homes

• Tanning your skin

• Direct generation of electricity

• Cooking using a solar oven

What is the main source of Geothermal Energy?

• Sun

• Moon

• Earth

• Mars

Select two disadvantages of a geothermal energy power station

• Expensive to build

• Lots of CO2 is produced when making one.

• They produce CO2 when in use

• They need a lot of people to run them.

If you drill down into the earth the temperature ________ by 25 degrees for every km closer to the centre of the earth.

A coal fired power station and a geothermal power station have some equipment/materials common to both. Select all that are used in both.

• Steam

• Water

• Turbine

• Generator

Solar cells are expensive, why? (select one - see the book)

• Cost of making them

• Need special skills to make them

• The factory needs to be away from earthquake zones

• Cost of the materials

What colour are the pipes in a solar water heater (usually)

• Shiny and silvery

• Matt/dull and black

• Green

• White and blue

Why is the centre of the earth hot? (check the book and select two answers)

• Nuclear reactions

• Friction due to the earths rotation

• Greenhouse gases produced in the earths atmosphere

• Heat left over when the earth was formed

(See the book) True or false: India can produce all the electrical energy it needs using solar cells

• True

• False