Wind + Water Energy Sources

Question 1

Wind Power

Answer 1

when the wind blows, it rotates a wind turbine, which can turn a generator

Question 2

Advantages of using Wind Power (3)

Answer 2

• source of renewable energy
• don’t take up much land space
• relatively low cost

Question 3

Disadvantages of using Wind Power (3)

Answer 3

• unreliable - only produces power when wind blows
• can be considered or ugly or an eyesore
• can cause noise pollution

Question 4

Water (Hydroelectric Power)

Answer 4

• water high above the ground is a store of gravitational potential energy
• hydroelectric dams trap water
• allowing it to fall rotating a turbine, which turns a generator

Question 5

Advantages of using Hydroelectric Power (3)

Answer 5

• renewable
• more reliable than wind and solar
• capable of producing lots of energy

Question 6

Disadvantages of using Hydroelectric Power (3)

Answer 6

• hydroelectric dams often change the paths of rivers
• can be affected by droughts and variation in water flow
• there are fewer suitable places to build a dam

Question 7

Tidal Energy

Answer 7

• the waves and tides in the sea are stores of kinetic energy
• tidal and wave power use this kinetic energy to rotate a turbine, which turns a generator