Earth and Space

January 2009
Essential Science Glossary II;2009, p42
Reference Entry
Definitions of several terms including "atmosphere," "comet," and "condensation," are presented. Atmosphere refers to the layer of gas surrounding a planet or a moon. Comet is a big ball of ice and rock that revolves the Sun. Condensation is the process wherein the water vapor comes out of the air and forms droplets.


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