carbon cycle

Front

What does NOT produce atmospheric carbon dioxide?

Back

Photosynthesis

Front

TRUE or FALSE?
All of the carbon in existence is continually recycled in the carbon cycle.

Back

True

Front

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

Back

fossil fuels

Front

The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?

Back

X: Decomposition, Y: Respiration

Front

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature? Options: lower levels of ozone in the atmosphere, lower levels of nitrogen in the atmosphere, higher levels of carbon dioxide and other greenhouse gases in the atmosphere, higher levels of oxygen in the atmosphere

Back

higher levels of carbon dioxide and other greenhouse gases in the atmosphere

Front

How is the burning of fossil fuels related to global warming?

Back

Greenhouse effect

Front

Which of the following is an example of a decomposer? Options: Owl, Fish, Tree, Mushroom

Back

Mushroom

Front

If the plant population decreased, the amount of total carbon on the planet would _________.

Back

Stay the same

Front

Which of the following are fossil fuels? Options: Coal, water, oil; Oxygen, coal, oil; Coal, Oil, Natural Gas; None of the above

Back

Coal, Oil, Natural Gas

Front

How does carbon become locked inside the earth?

Back

The carbon-rich bodies of plants and animals decay into the earth after they die.