Review: Carbon cycle

What is the carbon cycle?

The carbon cycle is the process through which carbon atoms circulate through the Earth's systems.

Photosynthesis

Process by which plants convert carbon dioxide and sunlight into glucose and oxygen.

Role of decomposers

Decomposers break down dead organisms, releasing carbon back into the soil and atmosphere.

Carbon sink

A carbon sink is a natural reservoir that stores carbon, like forests and oceans.

True or false: Carbon is only found in living organisms.

False, because carbon is found in rocks, oceans, and the atmosphere.

Difference between carbon source and sink

A carbon source releases carbon dioxide, while a sink absorbs it.

Respiration

The process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide.

Combustion

The process of burning fossil fuels, releasing carbon dioxide into the atmosphere.

Fill in the blank: The ocean absorbs carbon dioxide through _____

photosynthesis by marine plants.

What is fossil fuel?

Fossil fuels like coal and oil are formed from ancient organic matter and are carbon-rich.

True or false: All carbon is in the atmosphere.

False, because carbon is also stored in soil, plants, and minerals.

Human impact on the carbon cycle

Human activities like deforestation and burning fossil fuels increase atmospheric CO2.

Difference between short-term and long-term carbon cycles

Short-term involves rapid processes like photosynthesis; long-term involves geological processes.

What is carbon sequestration?

The process of capturing and storing atmospheric carbon dioxide to reduce global warming.