Renewable Energy Resources_ Part 2 _ GCSE Physics

The video discusses geothermal and solar energy. Geothermal energy is derived from radioactive decay heating rocks, which can heat water to produce steam for electricity generation. It is environmentally friendly but geographically limited. Solar energy uses cells to convert light into electricity, suitable for remote areas but currently costly and inefficient. However, solar technology is becoming more affordable over time.

What is the primary role of uranium in the process of generating steam?

• It directly generates electricity.

• It heats up rocks.

• It acts as a coolant.

• It absorbs steam.

In geothermal energy extraction, what is the purpose of pumping cold water down to hot rocks?

• To generate light energy.

• To cool the rocks.

• To create a vacuum.

• To heat the water and produce steam.

What is a significant advantage of geothermal energy?

• It is the cheapest energy source.

• It is available everywhere.

• It does not produce polluting gases.

• It produces polluting gases.

How do solar cells generate electricity?

• By using steam to drive turbines.

• By converting light energy into electrical energy.

• By converting heat energy into electrical energy.

• By using wind to rotate blades.

What is a disadvantage of solar cells mentioned in the video?

• They produce polluting gases.

• They are expensive and inefficient.

• They are inexpensive.

• They are highly efficient.