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GLOSSARY

Our comprehensive earth science glossary is available to assist in your understanding of the MY NASA DATA microsets, lesson plans and computer tools. Please select the first letter of the word you wish to check for a definition and further information.

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All definitions
T
troposphere:
the bottom layer of the atmosphere extending from the surface to an altitude between 8 kilometers (at poles) and 14 kilometers (in tropics); most weather occurs in this layer.   Graphic shows the different layers of Earth's atmosphere
Image courtesy NASA

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