Question

the carbon cycle describes the movement of carbon between living things, the atmosphere, the oceans, and earths crust. select the true statements. the total amount of carbon on earth changes significantly from year to year. overall, the ocean is a carbon sink. volcanoes emit less co₂ than human activities. photosynthesis takes more co₂ out of the atmosphere than any other process.

Explanation:

1. For "The total amount of carbon on Earth changes significantly from year to year": The total carbon on Earth is relatively constant as it cycles, so this is false (the check here is incorrect).
2. For "Overall, the ocean is a carbon sink": Oceans absorb more carbon than they release, so this is true.
3. For "Volcanoes emit less CO₂ than human activities": Human activities (like burning fossil fuels) emit far more CO₂ than volcanoes, so this is true.
4. For "Photosynthesis takes more CO₂ out of the atmosphere than any other process": Processes like ocean absorption can take more CO₂ than photosynthesis, so this is false (the check here is incorrect).

The true statements are "Overall, the ocean is a carbon sink" and "Volcanoes emit less CO₂ than human activities".

Answer:

• Overall, the ocean is a carbon sink.
• Volcanoes emit less CO₂ than human activities.