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OW Earth and Space
7th grade science Vocab
Term | Definition |
---|---|
Atmosphere | The layer of gases that surround the Earth. |
Geosphere | The solid portion of the Earth that includes the crust, mantle, outer and inner core. |
Hydrosphere | All the waters on earth's surface, such as lakes and seas, and sometimes water over earth's surface including clouds. |
Biosphere | The regions of the surface, atmosphere, and hydrosphere of earth that are occupied by living organisms. |
Greenhouse gases | is a gas in the atmosphere that absorbs and emits thermal energy; greenhouse gases include: carbon dioxide, methane, nitrous oxide. |
Nitrogen | Most abundant permanent gas in the atmosphere (78% of atmosphere consists of this gas). |
Oxygen | Second most abundant permanent gas in the atmosphere (21% of atmosphere consists of this gas). |
Carbon dioxide | Variable gas found in the atmosphere. |
Troposphere | The lowest layer of the atmosphere closest to Earth; most of Earth's air is found here and this is where weather occurs. |
Stratosphere | The layer above the troposphere; the ozone layer layer is found in this layer. |
Mesosphere | Located above the stratosphere; this is the layer in which meteors burn up to create shooting stars and it is also the coldest layer. |
Thermosphere | Located above the mesosphere; not much is known about this layer, but there is not much air in this layer. |
Exosphere | The outermost layer, furthest from Earth's surface; relatively thick layer but contains very little air. It is the transitional layer between Earth's atmosphere and outer space. |