Questions 1 - 10:
Complete the notes below. Write ONE WORD ONLY for each answer.
Marine renewable energy (ocean energy)
Introduction
More energy required because of growth in population and 1
What’s needed:
- renewable energy sources
- methods that won’t create pollution
Wave energy
Advantages:
- 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
Tidal energy
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 ham fish and birds, e.g. by affecting 10 and building up silt
Ocean thermal energy conversion
Uses a difference in temperature between the surface and lower levels
Water brought to the surface in a pipe