Earth

What is the name given to a fossil that best defines a rock layer's age?

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Where do hurricanes form?
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What is a front that does not advance called?
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Weather radar that measures direction and speed of a moving object best fits which science term?
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A mountain breeze is what kind of wind?
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What was TIROS I, launched on April 1, 1960?
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What type of radar measures radial velocity?
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What kind of rain is bad for the environment?
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What is the theory that describes how the continents got where they are today?
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