Questions 1–10
Complete the notes below.
Write ONE WORD ONLY for each answer.
Marine renewable energy (ocean energy)
More energy required because of growth in population and 1.
- renewable energy sources
- methods that won’t create pollution
Advantage: waves provide a 2. source of renewable energy
Electricity can be generated using offshore or onshore systems
Onshore systems may use a reservoir
Problems:
- waves can move in any 3.
- movement of sand, etc. on the 4. of the ocean may be affected
Tides are more 5. than waves
Planned tidal lagoon in Wales:
- will be created in a 6. at Swansea
- breakwater (dam) containing 16 turbines
- rising tide forces water through turbines, generating electricity
- stored water is released through 7. , driving the turbines in the reverse direction
Advantages:
- not dependent on weather
- no 8. is required to make it work
- likely to create a number of 9.
Problem:
- may harm fish and birds, e.g. by affecting 10. and building up silt
Uses a difference in temperature between the surface and lower levels
Water brought to the surface in a pipe