Marine Renewable Energy Concepts

The video discusses the growing energy demands and the environmental impact of fossil fuels. It introduces marine renewable energy, focusing on wave, tidal, and ocean thermal energy. Wave energy is constant but faces technological challenges. Tidal energy is predictable and a project in Wales aims to harness it using a tidal lagoon. Ocean thermal energy conversion relies on temperature differences in tropical areas. The video highlights the potential and challenges of these renewable energy sources.

What is one of the main reasons for the rising demand for energy?

• Reduction in industrial activities

• Abundance of fossil fuels

• Increasing population and expanding industry

• Decreasing population

Which of the following is NOT a category of marine renewable energy?

• Geothermal energy

• Tidal energy

• Wave energy

• Ocean thermal energy conversion

What is a major challenge in harnessing wave energy?

• Waves travel in every direction

• Waves are too predictable

• Waves are too small

• Waves are too slow

Why is tidal energy considered more predictable than wave energy?

• Tides are influenced by the sun

• Tides are affected by wind

• Tides have known high and low times

• Tides occur randomly

What is a tidal lagoon?

• A natural lake

• An area of sea water separated from the sea

• A type of wave energy device

• A geothermal energy source

What is a potential environmental concern of tidal lagoons?

• They require a lot of fuel

• They are dependent on weather conditions

• They disturb fish and bird migration patterns

• They increase greenhouse gas emissions

How many times a day would the proposed tidal lagoon in Wales generate electricity?

• Once

• Twice

• Three times

• Four times

What is the main requirement for ocean thermal energy conversion to work?

• High wind speeds

• Low water salinity

• A large temperature difference

• A small temperature difference

In which areas does ocean thermal energy conversion occur?

• Polar regions

• Tropical coastal areas

• Deserts

• Mountainous regions

What is the purpose of the submerged pipe in ocean thermal energy conversion?

• To capture wind energy

• To store solar energy

• To bring cold water to the surface

• To generate electricity directly