Carbon Cycle

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?

• The carbon cycle

• The water cycle

• The nitrogen cycle

• The phosphorous cycle

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does the human body return carbon to the atmosphere in the carbon cycle?

• Waste products

• Photosynthesis

• Cellular respiration

• Formation of glucose

Tags

NGSS.HS-LS2-5

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

Tags

NGSS.MS-LS2-3

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

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

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

• It will go into the soil

• It will go into the atmosphere

• It will runoff into nearby streams and rivers

• It will be destroyed

Tags

NGSS.MS-LS2-3

How do organisms (living things) move carbon through the carbon cycle?

• Respiration only

• Decomposition only

• Photosynthesis, respiration, and decomposition

• Decomposition and sedimentation

• Respiration, decomposition, sedimentation, and photosynthesis

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Bacteria

• Animals

• Humans

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

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

• Water
• Atmosphere
• Sun
• Air

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

• water
• nutrients
• air
• fossil fuels

Tags

NGSS.MS-ESS2-2

NGSS.MS-LS4-1

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

• Stay the same
• Increase
• Decrease

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3