Carbon Dioxide Oxygen Cycle

Which statement best describes the relationship between humans and plants in the carbon dioxide-oxygen cycle?

• Humans depend on oxygen released into the air by plants, and plants depend on carbon dioxide that humans release into the air.

• Plants produce carbon dioxide as a product of photosynthesis and release it into the air to provide energy for humans.

• Plants depend primarily on energy supplied by oxygen for photosynthesis, a process which releases carbon dioxide needed by humans.

• Humans and plants use gases in the air and the energy of sunlight to produce their own food.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

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-LS1-6

NGSS.MS-LS2-3

Many types of plants grow in a forest ecosystem. How do plants affect the air that forest animals breathe?

• Plants use oxygen from the air to make food.

• Plants release pollution into the air.

• Plants release energy from the sun into the air.

• Plants take in carbon dioxide and release oxygen into the air.

Tags

NGSS.MS-LS1-6

________________ could increase the amount of oxygen in the air.

• Building more houses

• Burning more oil

• Paving more streets

• Planting more trees

Tags

NGSS.MS-LS1-6

Plants release ____________.

• carbon dioxide

• oxygen

• plant food

Tags

NGSS.MS-LS1-6

People release _____________________.

• helium

• oxygen

• carbon dioxide

People cannot live without ______________.

• oxygen

• carbon dioxide

Animals release ___________________.

• oxygen

• carbon dioxide

Photosynthesis is a process where plants use sunlight, water and __________________ to produce sugar and release oxygen.

• carbon dioxide

• oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the process where animals and people use oxygen to make carbon dioxide?

• Photosynthesis

• Respiration