on the 34.____of the ocean may be affectedTidal energyTides are more 35.____than wavesPlanned tidal lagoon in Wales:• will be created in a 36.____at Swanseabreakwater (dam) containing 16 turbinesrising tide forces water through turbines, generating electricitystored water is released through 37.____driving the turbines in the reverse directionAdvantages:• not dependent on weatherno 38.____is required to make it worklikely to create a number of 39.____Problem:• may harm fish and birds, e.g. by affecting 40.____and building up siltOcean thermal energy conversionUses a difference in temperature between the surface and the underwater level Water brought to the surface in a pipe

SECTION 4 Questions 31-40Complete the notes below.Write ONE WORD ONLY for each answer.Marinrenewable energy (ocean energy)IntroductionMore energy required because of growth in population and 31.____.What's needed:• renewable energy sourcesmethods that won't create pollutionWave energyAdvantage: waves provide a 32.____source of renewable energyElectricity can be generated using offshore or onshore systemsOnshore systems may use a reservoirProblems:• waves can move in any 33.____movement of sand, etc. on the 34.____of the ocean may be affectedTidal energyTides are more 35.____than wavesPlanned tidal lagoon in Wales:• will be created in a 36.____at Swanseabreakwater (dam) containing 16 turbinesrising tide forces water through turbines, generating electricitystored water is released through 37.____driving the turbines in the reverse directionAdvantages:• not dependent on weatherno 38.____is required to make it worklikely to create a number of 39.____Problem:• may harm fish and birds, e.g. by affecting 40.____and building up siltOcean thermal energy conversionUses a difference in temperature between the surface and the underwater level Water brought to the surface in a pipe