Physics P1 4.3 Power from the Sun and the Earth.

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What do solar cells do?
Transfer solar energy directly into electricity.
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What do solar heating panels do?
Use the Sun's energy to heat water directly.
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What energy comes directly from inside the Earth?
Geothermal energy.
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How does solar energy travel from the Sun?
It travels through space to Earth as electromagnetic radiation.
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How much electricity is produced by a solar cell?
Each cell only produces a small amount of electricity, so they are useful to power small devices such as watches and calculators.
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What are solar panels made up of?
Large numbers of solar cells joined together.
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What happens to water flowing through a solar heating panel?
It is heated directly by energy from the Sun.
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How does a solar power tower work?
It uses thousands of mirrors to reflect sunlight onto a water tank to heat the water and produce steam.
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How is geothermal energy produced inside the Earth?
By radioactive processes that heat the surrounding rock.
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What is the process used to produce electricity from geothermal energy?
In volcanic or other suitable areas, very deep holes are drilled then cold water is pumped down to the hot rocks, there it is heated and rises to the surface again as steam which is used to drive turbines that turn generators and produce electricity.
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What is hot water that comes up to the surface naturally in a few parts of the world used for?
To heat buildings nearby.
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Why are large numbers of solar cells often joined to make a solar panel?
Each solar cell only produces a small amount of electricity.
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Why are only a few places in the world able to have geothermal power stations?
In many places in the world the hot rocks are too far below the surface to be used.
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**KNOW SOME EXAMPLES OF WHERE SOLAR ENERGY IS PARTICULARLY USEFUL FOR PRODUCING ELECTRICITY**
**LOOK UP DIAGRAMS OF GEOTHERMAL POWER STATION**
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Other cards in this set

Card 2

Front

What do solar heating panels do?

Back

Use the Sun's energy to heat water directly.

Card 3

Front

What energy comes directly from inside the Earth?

Back

Preview of the front of card 3

Card 4

Front

How does solar energy travel from the Sun?

Back

Preview of the front of card 4

Card 5

Front

How much electricity is produced by a solar cell?

Back

Preview of the front of card 5
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