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This set correlates with 4th grade science.
|atmosphere||The layer of gasses that surrounds the Earth that supports life.|
|troposphere||The layer of the atmosphere that is closest to the Earth’s surface, where weather takes place, water vapor is present, and humans live.|
|nitrogen||The atmosphere is composed of around 78% of this gas.|
|oxygen||The atmosphere is composed of around 21% of this gas.|
|other gasses||The atmosphere is composed of around 1% of these gasses.|
|water vapor and carbon dioxide||Gasses that make up about 1% of the atmosphere.|