Exploring the Carbon Cycle

During a science class, Olivia and James were discussing the role of photosynthesis in the carbon cycle. What is the primary role of photosynthesis in this cycle?

• To release carbon dioxide into the atmosphere

• To convert carbon dioxide into glucose

• To decompose organic matter

• To produce oxygen as a waste product

Answer explanation

The primary role of photosynthesis in the carbon cycle is to convert carbon dioxide into glucose, which plants use for energy and growth, thus playing a crucial role in carbon fixation. xyz xyz.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

During a science class, Olivia and James were discussing various natural processes. Which of the following processes releases carbon dioxide back into the atmosphere?

• Photosynthesis

• Respiration

• Nitrogen fixation

• Evaporation

During a science project, Olivia and James observed how decomposers contribute to the carbon cycle. What did they notice?

• They fix atmospheric nitrogen into the soil.

• They break down dead organisms, releasing carbon dioxide.

• They convert carbon dioxide into oxygen.

• They absorb carbon dioxide for photosynthesis.

Tags

NGSS.MS-LS2-3

During a science class, Olivia and Riddhi were discussing how plants and animals contribute to the carbon cycle. Which of the following best describes the relationship between photosynthesis and respiration in this cycle?

• Photosynthesis and respiration are unrelated processes.

• Photosynthesis releases carbon dioxide, while respiration absorbs it.

• Photosynthesis absorbs carbon dioxide, while respiration releases it.

• Both processes release carbon dioxide into the atmosphere.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Olivia and James are learning about how plants make their own food. During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. Write the balanced chemical equation for this process.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Riddhi and James are studying the impact of deforestation on the carbon cycle. What effect does deforestation have?

• It increases the rate of photosynthesis globally.

• It decreases the amount of carbon dioxide in the atmosphere.

• It reduces the number of trees available to absorb carbon dioxide, increasing atmospheric CO2 levels.

• It has no significant impact on the carbon cycle.

Tags

NGSS.MS-ESS3-4

During a science project, Riddhi and Olivia are studying the carbon cycle in a forest ecosystem. They observe that decomposers play a crucial role. What role do decomposers play in the carbon cycle, and why are they essential for ecosystem health?

• They produce oxygen for other organisms.

• They recycle nutrients by breaking down dead matter, releasing carbon back into the atmosphere.

• They absorb carbon dioxide for photosynthesis.

• They store carbon in the form of fossil fuels.

Tags

NGSS.MS-LS2-3

Olivia and James are studying the impact of increased atmospheric carbon dioxide on plant growth in their school garden. They want to know how this change affects the rate of photosynthesis.

• It decreases the rate of photosynthesis.

• It has no effect on the rate of photosynthesis.

• It increases the rate of photosynthesis up to a certain point.

• It stops photosynthesis completely.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-5

During a biology class, Olivia and James were discussing how plants interact with the atmosphere. Olivia asked James to identify the process by which plants release carbon dioxide back into the atmosphere. What is the correct process?

• Photosynthesis

• Transpiration

• Respiration

• Decomposition

Tags

NGSS.HS-LS2-5

Olivia and James are discussing how human activities, such as burning fossil fuels, affect the carbon cycle. What impact do these activities have?

• They decrease the amount of carbon dioxide in the atmosphere.

• They increase the amount of carbon dioxide in the atmosphere, contributing to climate change.

• They have no effect on the carbon cycle.

• They increase the rate of photosynthesis globally.

Tags

NGSS.HS-LS2-5

NGSS.HS-ESS2-6

NGSS.HS-ESS3-5