Carbon and Nitrogen Cycles

Why is carbon a very important element?

• Carbon is the central element to all living organisms

• Carbon is key to producing electricity

• The Sun needs carbon to produce energy

• All of these

Tags

NGSS.MS-ESS2-1

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Processes that add carbon to the atmosphere are called _____ and processes that remove carbon from the atmosphere are called _____

• Sinks, Feedbacks

• Feedbacks, Sinks

• Sources, Sinks

• Sources, Feedbacks

Tags

NGSS.MS-ESS3-5

Which part of the carbon cycle involves animals breathing in oxygen and out carbon dioxide?

• Transpiration

• Decomposition

• Combustion

• Respiration

Photosynthesis is the process by which plants

• Turn CO2 into sugars

• Release CO2 to the atmosphere

• Turn sugars into CO2

• All of these

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following does not add CO2 to the atmosphere?

• Cooking with gas

• Planting trees

• Burning wood

• Riding in a bus

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

• The lion breathes in carbon given out by the plant

• The lion eats the grass

• The lion eats a herbivore that ate the grass

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

Tags

NGSS.MS-LS2-3

Which carbon sink contains the most carbon?

• Forests

• Oceans

• Geosphere

Tags

NGSS.HS-ESS2-6

How does deforestation increase the amount of CO2s in the air?

• Less trees to release oxygen

• As trees are cut, they release CO2

• By causing a loss of trees that would otherwise remove CO2 from the air

• All of these

Nitrogen used by plants is in the form of

• Ammonia

• Nitrates

• Nitrous oxide

• Nitric oxide

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Around what percentage of the Earth's atmosphere is nitrogen?

• 14%

• 30%

• 49%

• 78%