Term
| C-How is energy lost at each step of the food chain? |
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Definition
| By movement, heat, waste material and respiration. |
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Term
| C- Which food webs are the most stable? |
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Definition
| The food webs with lots of links. |
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Term
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Definition
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Term
| C- What is the job of decomposers? |
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Definition
| They get their energy from decaying natural waste, this releases materials which can be used again by producers. |
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Term
| C- What does "population" mean? |
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Definition
| The number of organisms of one type which live in a habitat. |
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Term
| C- What other factors limit population growth? |
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Definition
| Disease, migration, climatic disasters. |
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Term
| C- What do CFCs do to the environment? |
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Definition
| Breakdown the ozone layer which shields the Earth from solar radiation. |
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Term
| C- What does Carbon dioxide do to the environment? Explain in detail. |
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Definition
| Produces "Greenhouse effect"- Less heat escapes from the Earth resulting in environmental changes (e.g. polar ice-caps melt, sea level rises, changes in climate and vegetation) |
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Term
| C-How can we reduce air pollution? |
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Definition
| Using alternative to fossil fuels, scrubbing fumes) |
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Term
| C-Explain in detail what happens when a river becomes polluted with organic waste |
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Definition
| Organic waste (waste made of bits of dead plants/animals) is food to bacteria. Bacteria number increases. Bacteria use up most of the oxygen in the water. Other living things have no more oxygen and die. |
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Term
| C-What happens to pollutants along the food chain? |
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Definition
| They accumulate, the final consumer gets a big dose because its prey will have eaten many contaminated living things. |
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