Earth

What are the three main categories of rock?

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What name was given to the west wind by the Greeks?
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What acidic precipitation occurs when sulfur dioxides build up in the clouds?
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What is the low pressure area along the equator called?
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The Hawaiian Islands are a good example of which type of volcano?
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Which of these African watersheds is the largest in size?
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What "foggiest" world capital averages 47 fogs a year?
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Which of these is a way to curb human pollution?
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What word is generally used to describe visible air pollution?
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