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

Which of the following removes carbon from the atmosphere? Options: Combustion, Respiration, Photosynthesis, Death

Back

Photosynthesis

Front

What process occurs when coal (a fossil fuel) is used for energy?

Back

Combustion

Front

If deforestation causes the tree population to decrease, the amount of carbon in the atmosphere would _________.

Back

Increase

Front

Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?

Back

The carbon cycle

Front

How does the human body return carbon to the atmosphere in the carbon cycle? Options: Waste products, Photosynthesis, Respiration, Formation of glucose

Back

Respiration

Front

Which of the following is an example of human impact on the carbon cycle?

• The increased production of methane gases from cattle farms
• The burning of fossil fuels
• The cutting down of trees for lumber
• Driving automobiles
• All of the above

Back

All of the above

Front

If a forest fire occurs, what will happen to the carbon in the forest?

Back

It will go into the atmosphere