P3.2 - Energy From Wind And Water (Finishedish)

Question 1

How does wind power work?

Answer 1

The force of the wind drives the turbine’s blades around turning a generator producing electric energy

Question 2

What are 3 advantages of wind turbines?

Answer 2

• No fuel or running costs
• No permanent damage to the landscape, removed turbines remove effects
• No pollution

Question 3

How does a wave generator generate electricity?

Answer 3

Waves make a floating generator move up and down turning a generator

Question 4

What is one advantage and two problems of wave power?

Answer 4

Advantage - no pollution
- no fuel cost
Disadvantage:
- Disturbing the seabed and habitats
- Danger to boats
- Fairly unreliable

Question 5

How does hydroelectric power work?

Answer 5

1) A valley is flooded and big dam built

2) Water is allowed to flow through turbines turning a generator to produce enegy

Question 6

How does tidal power/barrages work?

Answer 6

1) Water from each tide is trapped behind barrages

2) The water is then allowed to go out through turbines at a controlled speed

Question 7

What are two disadvantages of tidal barrages?

Answer 7

• Prevents free access by boats
• Spoils the view
• Alters wildlife habitat
• Height of tide is variable