Questions 31-40
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 31
What’s needed:
● renewable energy sources
● methods that won’t create pollution
Wave energy
Advantage: waves provide a 32 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 33
● movement of sand, etc. on the 34 of the ocean may be affected
Tidal energy
Tides are more 35 than waves
Planned tidal lagoon in Wales:
● will be created in a 36 at Swansea
● breakwater (dam) containing 16 turbines
● rising tide forces water through turbines, generating electricity
● stored water is released through 37 , driving the turbines in the reverse direction
Advantages:
● not dependent on weather
● no 38 is required to make it work
● likely to create a number of 39
Problem:
● may ham fish and birds, e.g. by affecting 40 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
