Part 1
Section 4
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
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
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