Question

Francine is developing a model of the carbon cycle, which involves the movement of carbon among various Earth systems. She begins by drawing the diagram shown below.

Her friend Byron evaluates the model and suggests that she thicken the arrow leading from fossil fuels to the atmosphere. His reasoning is that fossil fuels are being burned at a much faster rate than natural processes are restoring them.

Label the model to show where it represents photosynthesis, cellular respiration, and the burning of carbon-containing materials.

Answer 1

Answer: in the upper box on the black arrows above the forest is photosynthesis and on the other one in that same circle is cellular respiration. Burning goes on the longest white arrow that goes from fossil fuels.

Answer 2

The labelling of the model is in the image.

• The Model describe the carbon cycle in which there is a diagrammatical representation of how carbon is exchanged among the biosphere, hydrosphere, geosphere and atmosphere.

What is a carbon cycle?

It is a biogeochemical cycle by which carbon is exchanged among various spheres of the Earth.

• It shows the nature's way of reusing carbon atoms, into organism in the Earth and then back to the atmosphere over and over again.

To know more about carbon cycle here

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