Hydro-electricity, Waves and Tides

• What is the main topic of the study material?

  Hydroelectricity, Waves, and Tides
• What is a significant environmental impact of hydroelectric power?

  Flooding of valleys affecting habitats
• How does flooding from hydroelectric power affect vegetation?

  It releases methane and CO₂ from vegetation
• What is a potential consequence of flooding on animal habitats?

  Loss of habitat for some species
• What happens to reservoirs when they dry up?

  They look very unsightly
• How do hydroelectric power stations impact human populations?

  They reduce environmental impact on humans
• What is a major advantage of hydroelectric power?

  It provides an immediate response to demand
• What is a limitation of hydroelectric power regarding reliability?

  Reliability issues during droughts
• How can hydroelectric power be useful in remote areas?

  It generates electricity on a small scale
• What is a common method for generating electricity from tides?

  Building tidal barrages
• How do tidal barrages generate electricity?

  They are built across river estuaries
• What happens as the tide comes in at a tidal barrage?

  It fills up the estuary
• What occurs when water is released from a tidal barrage?

  It generates electricity at controlled speed
• What is a key benefit of tidal energy?

  It does not produce pollution
• What is a disadvantage of tidal energy systems?

  They can disrupt marine ecosystems
• How do tidal energy systems affect marine life?

  They can disturb habitats and migration
• What is a challenge with wave energy systems?

  They are often unreliable
• How do wave energy systems generate electricity?

  They harness the energy of ocean waves
• What is a common issue with wave energy systems?

  They tend to die out when wind drops
• What is the initial cost of wave energy systems?

  They are high
• What is a benefit of wave energy systems regarding fuel costs?

  They have no fuel costs
• How does wave energy compare to other energy sources?

  It is less reliable than most sources
• What is a significant drawback of wave energy systems?

  They are not suitable for large-scale energy
• How do wave energy systems impact coastal areas?

  They can alter coastal ecosystems
• What is a common environmental concern with wave energy systems?

  They can disrupt marine habitats
• What is the main problem with wave energy reliability?

  Waves tend to die out
• What is a potential benefit of wave energy systems?

  They can be used in small islands
• How do wave energy systems compare to wind energy systems?

  Wave energy is less predictable than wind
• What is the main advantage of tidal energy?

  It is predictable and reliable
• How do tidal barrages affect local ecosystems?

  They can disrupt natural tidal flows
• What is a significant challenge with tidal energy systems?

  They can impact marine life negatively
• What is the main environmental concern with tidal energy?

  Disruption of marine habitats
• How do tidal energy systems generate electricity?

  By harnessing the gravitational pull of the moon
• What is a common issue with tidal energy reliability?

  It can be affected by weather conditions
• What is a significant drawback of tidal energy systems?

  They can be expensive to build
• How do tidal energy systems impact local communities?

  They can provide reliable energy sources
• What is a potential benefit of tidal energy for coastal areas?

  It can provide a stable energy supply
• What is the main advantage of wave energy systems?

  They have no fuel costs
• How do wave energy systems generate electricity?

  By harnessing the energy of ocean waves
• What is a common issue with wave energy systems?

  They tend to die out when wind drops