Exploring the Carbon Cycle: Definition, Steps, and Importance

What percentage of the Earth's atmosphere is composed of nitrogen?

• 20.95%

• 78.08%

• 1%

• 99%

Which gas do plants take in during photosynthesis?

• Helium

• Oxygen

• Nitrogen

• Carbon Dioxide

Tags

NGSS.MS-LS1-6

What is the term used to describe the Earth as a system where nothing can enter or leave?

• Static System

• Dynamic System

• Closed System

• Open System

Which of the following is NOT a source of carbon dioxide entering the atmosphere?

• Decomposition

• Photosynthesis

• Combustion

• Respiration

What process do plants use to make carbohydrates from carbon dioxide?

• Respiration

• Photosynthesis

• Decomposition

• Combustion

Tags

NGSS.MS-LS1-6

What happens to the carbon in the bodies of producers and consumers when they die?

• It is decomposed and returned to the atmosphere as carbon dioxide

• It is released into the atmosphere as oxygen

• It is buried and never returns to the atmosphere

• It turns into water

Tags

NGSS.MS-LS2-3

How do aquatic animals use carbon dioxide?

• To produce energy

• To breathe

• To decompose organic matter

• To form calcium carbonate for their shells

Tags

NGSS.HS-LS2-5

What is the result of atmospheric carbon combining with water?

• Formation of carbonic acid

• Formation of oxygen

• Formation of helium

• Formation of nitrogen

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the process called when carbonic acid dissolves rocks?

• Chemical weathering

• Biological weathering

• Physical weathering

• Mechanical weathering

What percentage of the atmosphere is carbon dioxide?

• 0.03%

• 20.95%

• 78.08%

• 1%