Energy and Carbon Cycle Quiz

Which process converts sunlight into chemical energy in plants?

• Photosynthesis

• Cellular respiration

• Decomposition

• Fermentation

What is the main gas taken in by plants during photosynthesis?

• Oxygen

• Carbon dioxide

• Nitrogen

• Methane

Which of the following is a product of cellular respiration?

• Glucose

• Oxygen

• Carbon dioxide

• Sunlight

Which ecosystem is likely to store the most carbon?

• Desert

• Tropical rainforest

• Tundra

• Grassland

Which statement best describes the flow of energy in photosynthesis and cellular respiration?

• Energy flows from glucose to sunlight in both processes.

• Energy is stored in glucose during photosynthesis and released during cellular respiration.

• Both processes release energy as heat.

• Energy is lost in both processes.

How does the carbon cycle differ between a forest and an ocean ecosystem?

• Forests store more carbon in plant biomass, while oceans store more in dissolved forms.

• Oceans have no carbon storage.

• Forests do not participate in the carbon cycle.

• Both store carbon in the same way.

Which component is NOT directly involved in the carbon cycle?

• Plants

• Animals

• Rocks

• Plastic

What would most likely happen to the carbon cycle if photosynthesis stopped occurring on Earth?

• Carbon dioxide levels would decrease.

• Carbon dioxide levels would increase.

• Oxygen levels would increase.

• There would be no change.

A scientist observes that a wetland ecosystem stores more carbon than a grassland. What could explain this difference?

• Wetlands have more plant biomass and slower decomposition rates.

• Grasslands have more sunlight.

• Wetlands have less water.

• Grasslands have more animals.

Explain how energy flow and carbon cycling are connected in an ecosystem, using photosynthesis and cellular respiration as examples.

• Energy and carbon move in opposite directions and are not related.

• Photosynthesis captures energy and carbon, storing them in glucose, while cellular respiration releases both for use by organisms.

• Only energy flows, not carbon.

• Only carbon cycles, not energy.