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18 Cards in this Set
- Front
- Back
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Define global warming
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Warming of the Earth due to greenhouse gases in the atmoshpere trapping infared radiation from the surface
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Name two substances that cause global warming
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methane and carbon dioxide
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How is carbon dioxide removed from the atmoshpere?
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By photosythesis in plants
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What will happen to carbon dioxide due to global warming?
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Less carbon dioxide is sequestered in ocean and lakes
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What does sequestered mean?
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stored for a long period of time
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Explain why natural sinks cannot cope?
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Because the levels of carbon dioxide are increasing due to human activity, but there are less plants to absorb the carbon dioxide
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What is the greenhouse effect?
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The trapping of infared radiation from the sun as a result of greenhouse gases in the Earths atmoshpere
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What does the greenhouse effect maintain?
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The surface if the Earth at a temperature suitable for life
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Name two Greenhouses gases
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Carbon dioxide and Methane
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What do Greenhouse gases do?
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They absorb infared radiation from the Earth, and result in warming up the atmosphere
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Name some effects of global warming
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Big changes in the Earths Climate, a rise in sea level, changes in migration patterns, changes in distribution of species and reduced biodiversity
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What do scientist believe climate change will cause?
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An increase in severe and unpredictable weather conditions
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What will cause sea levels rise?
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If the Earth warms up, the ice caps at the North and South poles will melt and sea levels will rise
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What will rising sea levels mean?
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More flooding for low-lying shores, and eventually parts of countries or even whole countries will disappear
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Name three examples of animals whose migration patterns may change
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birds, insects and mammals
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How will the distribution of animals change if glabal warming continues?
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Some animals may extend their range as climate change makes conditions more favourable, others may find their range shrinks
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Why may animals become extinct?
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As the climate changes some animals may not be able to survive
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Name an example of an animal and why it might become extinct
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Polar Bears as Artic ice melts
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