Earth

Ruby and sapphire are gem forms of which mineral?

More Questions from Earth
How long does it take the earth to rotate around its axis?
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What does a konimeter measure?
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What word is generally used to describe visible air pollution?
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What term describes the overflowing of rivers or streams?
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Which is the process of placing plants in a certain way in an area?
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Which is the common name for the top layer of the zone of saturation?
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Which type of irrigation is most commonly used throughout the world?
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What is the federal weather agency in Canada called?
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