Earth

Which scale is used to describe a mineral's hardness?

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A weather proverb says "A year of snow," followed by what?
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What name is given to 23.5 degrees north latitude?
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What percentage of rock-forming minerals are silicates?
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Which of these is a spiral storm that can be many miles wide?
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What is the repeating cycle of precipitation, condensation and evaporation called?
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What is the name of the submerged fringe of a continent?
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Where are tropical zones located on the Earth?
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What is a plant with no internal system of tube like structures called?
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