Hydro electricity and tidal barrage

• What are the two systems used to generate electrical power discussed in the video?

  Hydroelectric dams and tidal barrages
• How do hydroelectric dams and tidal barrages generate electricity?

  By using differences in water levels
• What does a hydroelectric dam trap to create a reservoir?

  Water from upstream
• What is a reservoir in the context of hydroelectric dams?

  A large accumulation of trapped water
• What natural phenomenon do tidal barrages utilize to generate power?

  The cyclic rise and fall of sea levels
• What causes high tides in the ocean?

  The effect of the moon's gravity
• Where are tidal barrages typically placed?

  In estuaries where rivers meet the ocean
• How do tidal barrages generate electricity?

  By trapping water during high tide
• What type of energy is converted into electricity in both systems?

  Gravitational potential energy
• What happens to the water after it passes through the turbines in a dam?

  It flows back into the river
• What are the pros of hydroelectric dams and tidal barrages?

  • Generate large amounts of energy
  • No pollution produced
  • Reliable electricity sources
  • Low running costs
  • Can operate on various scales
• How do hydroelectric dams impact the surrounding environment?

  They can flood large areas and habitats
• What is a potential negative effect of both hydroelectric dams and tidal barrages on aquatic life?

  They can stop fish from migrating
• Why can hydroelectric dams respond quickly to increased electricity demand?

  They can adjust water flow rapidly
• What is a common feature of both hydroelectric dams and tidal barrages?

  They both generate electricity from water