Carbon Basics
Carbon in the atmosphere
Carbon in Living Things
Human Impact
Carbon storage & Movement
100

The element that cycles between the atmosphere, oceans, land, and living things.

Carbon

100

The main greenhouse gas involved in the carbon cycle.

carbon dioxide (CO₂)

100

The group of molecules—like proteins, lipids, and nucleic acids—that all contain carbon.

organic molecules

100

The cutting down of trees that reduces carbon storage.
 

Deforestation?

100

The largest carbon sink on Earth.
 

oceans

200

The main molecule plants make during photosynthesis that contains carbon.

Glucose

200

The gas produced when fossil fuels are burned.

CO₂?

200

The process plants use to capture carbon and energy from the sun.

Photosynthesis

200

The burning of these materials releases ancient carbon.
 

fossil fuels

200

The place where carbon can be stored for millions of years as fossil fuels.

underground rock formations (coal, oil, natural gas deposits)?

300

The process by which carbon moves from plants and animals back into the atmosphere.

Respiration

300

The cycle process that removes CO₂ from the air and puts it into plants. 

Photosynthesis 

300

The process animals use to release CO₂ by breaking down food.

cellular respiration

300

The main human activity causing ocean acidification.
 

CO₂ emissions from burning fossil fuels?

300

The term for carbon moving between reservoirs (atmosphere, biosphere, hydrosphere, geosphere).
 

fluxes

400

The process that breaks down dead organisms, releasing carbon.

Decomposion

400

The type of rock that forms when marine organisms use carbon to build shells.

Limestone

400

The organisms that break down dead matter, recycling carbon.

decomposers?

400

The practice of capturing and storing CO₂ underground.
 

carbon capture and storage

400

The process by which volcanoes release carbon into the atmosphere.
 

outgassing?

500

The long-term storage of carbon in rocks and fossil fuels.

carbon sequestration

500

The human activity that has most increased CO₂ levels since the Industrial Revolution.

Burning fossil fuels

500

The role of phytoplankton in the ocean carbon cycle.

absorbing CO₂ through photosynthesis

500

The global effect of too much CO₂ in the atmosphere.

climate change (global warming)?

500

The process of carbon moving from the atmosphere into ocean water.
 

diffusion (or absorption)

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