Exam 5: Ecosystems and Matter Cycling

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The law of conservation of matter tells us that ________.

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Acidic rainwater has a pH lower than ________.

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Water is a compound made up of ________.

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Canada has up to one-third of the world's fresh water.

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What is the rock cycle? Describe weathering.

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Phosphorus stored in the lithosphere becomes available for biomass through ________.

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Atmospheric sulphur often comes from ________.

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Energy has mass and takes up space.

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Lightning can play a role in fixing nitrogen for plant uptake.

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Granite rock is a large reservoir of carbon.

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Eutrophication only occurs as a result of human activity.

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The process of eutrophication can be slowed by ________.

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Humans intervene in the phosphorus cycle in several ways that accelerate its mobilization but NOT by ________.

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Common loons need lake water with a pH of at least ________ to find enough food to feed their young.

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