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Using the sun's energy P2

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What type of current does a Photocell produce?

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What are Photocells usually made of?

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When sunlight falls on the cell the silicon atoms

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some of the ennergy, knocking loose some

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These electrons then

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round a circuit, which is electricity.

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The

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and

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of a photocell depends on:

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-the bigger the cell the more electricity produced.

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-brighter light=more electricity.

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-the closer the cell, the more intense the ight hitting it will be.

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Match the advantages and disadvantages of Photocells.

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Environmental advantages
Advantages
Disadvantages

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They are sturdy, low maintenance and last a long time due to having no moving parts. You don't need any power cables and solar power won't run out-it is a renewable energy source.
No fuel is needed and they don't pollute the environment.
If there is no sunlght there is no power-they don't work at night or in bad weather.

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In what form does the sun mostly give out energy?

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What is one way the sun's energy is stored here on Earth?

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Curved mirrors focus the Sun's light and heat-match the following

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A single curved mirror
Large curved mirrors, or a combination of many smaller ones
All devices that collect energy from the sun are most efficient
If collectors are pointed directly at the Sun then

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can be used to generate steam to produce electricity.
they can capture the maximum amount of light and heat.
can be used as a solar oven.
if they track the Sun's movement across the sky.

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