Hydro Electricity and Tidal Barrage

Question 1

How do hydroelectric damns work?

Answer 1

• Big dam that prevents water from flowing like it should.
• ## Higher water level on one side.

Question 2

How is electricity generated?

Answer 2

• By the difference in water levels.
• Difference in height= stored water has a huge amount of GPE energy.
• ## Can be converted into electricity.

Question 3

How does tidal barrages work?

Answer 3

• The force of the water being released in the reservoir spins the blades of the turbines.
• Connected to generators= and generate electricity.
• After passing through the turbines the water flows back into the river.

Question 4

Pros?

Answer 4

• Generate large amounts of energy + no pollution.
• Reliable sources of electricity.
• Hydroelectric Dams: Immediate response to increased demand.
• Running costs are fairly low.
• ## Work on both large and low scales.

Question 5

Cons?

Answer 5

• Often have a big impact on their surrounding enviroment.
  Hydroelectric dams: Often flood huge areas.
  results in submerging habitans and villages.
• Stops boats and fishes from travelling.
• Initial set up is expensive.