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Unit 8 Lesson 4

Living Things and the Carbon Cycle

TermDefinition
atmosphere the layer of gases that surrounds the planet
biomass all living (or formerly living) material in an ecosystem
biosphere all the living things on Earth
carbon dioxide the main gas moved during the carbon cycle
carbon sink an area where carbon is stored
carbon source an area or a process that releases carbon
geosphere (lithosphere) the solid Earth, including the crust and Earth's interior
hydrosphere all the water on Earth
keystone species species upon which success of the ecosystem depends
marine snow dead biomass falling from the upper areas of the water column to the lower ares
nitrogen the main gas of the atmosphere on Earth
photosynthesis process by which autotrophs convert light energy into chemical energy
plankton microscopic organisms living in the water; serves as the basis of the food chain
Created by: atrang
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