Carbon Dioxide

Animals and plants use substances that cycle through the environment.  Which substance is needed by plants to survive and is released into the environment by animals?

• oxygen

• sugar

• salt

• carbon dioxide

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

If the removal of many plants and trees increase in a forest, what effect could this have on the carbon dioxide and oxygen cycle?

• CO2 levels decrease

• CO2 levels increase

• Nitrogen levels decrease

• Oxygen levels increase

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

In the carbon cycle, producers take in the gas __

• carbon dioxide

• oxygen

• nitrogen

• carbon monoxide

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water

• Atmosphere

• Sun

• Air

The carbon dioxide-oxygen cycle is best defined as-

• the process in which plants use energy from the sun to make their own food

• a green substance in plant leaves that captures energy from the sun

• living things

• the movement of carbon dioxide and oxygen between organisms and the air

Tags

NGSS.MS-LS2-3

Why is the CO2 and O2 cycle considered to be a cycle?

• there is a exchange of gases

• the trees use it and trees are apart of all cycles

• there is a continuous exchange of gases

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NGSS.MS-LS2-3

The CO2/O cycle is important to animals because it provides

• a gas they take in when breathing

• chemicals that build bones

• energy they need to move

• fresh water for their survival

Which of the following removes carbon from the atmosphere?

• Combustion

• Respiration

• Photosynthesis

• Death

Tags

NGSS.MS-LS1-6

carbon dioxide is a gas produced  by ________ and used by __________

• plants and animals 

• carbon and photosynthesis

• animals and plants 

• photosynthesis

Tags

NGSS.MS-LS1-6

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

• The lion eats the grass

• Carbon from grass doesn't end up in a lion. 

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

• The lion breathes in carbon given out by the plant

Tags

NGSS.MS-LS2-3