SC21 Revision

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The substances and their proportions that make something up. For example, the proportions of today’s atmosphere is 78% nitrogen, 21% oxygen, 1% argon and other gases.
Composition
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Layer of gases that surrounds the earth.
Atmosphere
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The release of gases and/or molten rock by volcanoes.
Volcanic activity
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A series of enzyme-catalysed reactions carried out in the green parts of plants. Carbon dioxide and water combine to form glucose. This process requires light energy from sunlight.
Photosynthesis
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Electromagnetic radiation that we can feel as heat.
Infrared
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To give out.
Emit
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To soak up or take in.
Absorb
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When gases in the atmosphere absorb energy transferred by infrared waves from the Earth, which causes the atmosphere to be warmer than it otherwise would be.
Greenhouse effect
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A gas that helps to trap “heat” in the atmosphere. Carbon dioxide, methane and water vapour are greenhouse gases.
Greenhouse gas
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The increase in the Earth’s average temperature likely to be caused by increased amounts of carbon dioxide in the atmosphere.
Global warming
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Changes that happen to the global weather patterns as a result of global warming.
Climate change
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A relationship between two variables, so that if one variable changes, so does the other. This can be positive or negative.
Correlation
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When one thing can be shown to be causing another thing.
Causal link
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The smallest change that can be measured by an instrument. For example, in a microscope, it is the smallest distance between two points that can be seen as two points and not blurred into one point.
Resolution
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Other cards in this set

Card 2

Front

Layer of gases that surrounds the earth.

Back

Atmosphere

Card 3

Front

The release of gases and/or molten rock by volcanoes.

Back

Preview of the front of card 3

Card 4

Front

A series of enzyme-catalysed reactions carried out in the green parts of plants. Carbon dioxide and water combine to form glucose. This process requires light energy from sunlight.

Back

Preview of the front of card 4

Card 5

Front

Electromagnetic radiation that we can feel as heat.

Back

Preview of the front of card 5
View more cards

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