Carbon cycle

Front

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide. Options: Water, Atmosphere, Sun, Air

Back

Atmosphere

Front

Which one of these does not add CO2 to the atmosphere? Options: cooking with gas, planting trees, burning wood, riding in a bus

Back

planting trees

Front

What does not produce carbon dioxide? Options: Photosynthesis, Burning Fossil Fuels, Animal respiration, Plants decaying

Back

Photosynthesis

Front

How do living organisms return carbon to the atmosphere in the carbon cycle?

Back

decomposition and respiration

Front

How does the carbon in grass become part of a lion?

Back

The carbon ends up in the lion's food chain. 

Front

Is all of the carbon in existence continually recycled in the carbon cycle?

Back

True

Front

Organisms that do not decompose can be buried and become what?

Back

fossil fuels

Front

If the plant population decreased, the amount of carbon would _________. Options: Stay the same, Increase, Decrease

Back

Increase

Front

What organisms in the ocean absorb the most carbon dioxide? Options: Algae and marine plants, Ocean mammals, like whales and dolphins, Fish, Coral

Back

Algae and marine plants

Front

By what method is the majority of carbon moved from the lithosphere (upper part of Earth's crust) to the atmosphere?

Back

The burning of fossil fuels