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 Assesment Questions

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Posts : 191
Join date : 2008-09-24

PostSubject: Assesment Questions   03/03/09, 10:53 pm

1. Name and describe two ways in which pollution affects ecosystems.
2. How does the greenhouse effect keep Earth warm?
3. Explain how a build-up of carbon dioxide in the atmosphere could increase Earth’s global temperature.
4. Describe how acid rain falling in a forest could disrupt the trophic structure of the ecosystem.
5. Greenhouse gases are found close to Earth’s surface and high above in the atmosphere. Name two important functions of greenhouse gases at Earth’s surface.
6. CONNECTING CONCEPTS- Ocean producers such as phytoplankton are an important part of food webs, but they need specific temperature to survive. How might increased water temperatures affect these ocean food webs?
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