Question

1 matching 5 points
match each description with its correct term.
uses low pressure and warm water to boil cold water
combines hydrogen and oxygen to produce electrical energy
uses the suns energy and a semiconductor to produce a very small amount of electrical energy
uses the suns energy to heat a liquid, which then heats a building
uses the suns energy to heat a building directly

Explanation:

1. Vacuum - flask principle (lowering pressure lowers boiling point).
2. Fuel - cell.
3. Solar - cell.
4. Solar - heating system.
5. Passive solar - heating.

Answer:

1. Vacuum - flask principle
2. Fuel - cell
3. Solar - cell
4. Solar - heating system
5. Passive solar - heating