Carbon-Oxygen cycle

Carbon-Oxygen cycle

Ch.3,L.3 How does matter move through an ecosystem?

Multiple Choice

Oxygen cycle and carbon cycle are two SEPERATED cycles.

• True

• False

Multiple Choice

The Oxygen gas is about ______________ of the air that we breath

• 20%

• 1%

Multiple Choice

The Carbon dioxide is less than ______________ of the air that we breath

• 20%

• 1%

Multiple Choice

In respiration animals take in __________________

• Oxygen

• Carbon dioxide

Multiple Choice

In respiration animals release __________________

• Oxygen

• Carbon dioxide

Multiple Choice

What does NOT produce carbon dioxide?

• Photosynthesis.

• Burning fuel.

• Animal respiration.

Multiple Choice

If the plant population decreased, the amount of carbon dioxide would _________.

• Stay the same

• Increase

• Decrease

Multiple Choice

if there is a fire in a forest, there will be less _____________in the environment?

• Carbon dioxide

• Oxygen

Multiple Select

Choose the sources of carbon dioxide.

• Respiration.

• Photosynthesis.

• Burning process.

• Decomposing dead organisms.

Multiple Select

Choose the sources of the Oxygen

• Respiration.

• Photosynthesis.

• Burning process.

• Decomposing dead organisms.