Earth

What is the estimate of the true age of a mineral or rock called?

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Which of these is a warm spell of weather when ice and snow melt?
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What is the term used to classify igneous rocks that are light in both color and gravity?
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Weather radar that measures direction and speed of a moving object best fits which science term?
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What is the measure of the moisture level of air called?
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What process helps to break down rocks by wind, air or rain?
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Which of these is not a group of modern desert?
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What instrument indicates wind direction?
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What is the solid form of water?
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