One way carbon moves from the atmosphere to the biosphere is through a process by which plants use light energy and convert it into biochemical energy. What is this process called?

Photosynthesis, the mechanism of converting light energy into chemical energy through green plants and many other organisms. Light energy is absorbed and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds during photosynthesis in green plants.

In the food chain, for example, plants, by photosynthesis, transfer carbon from the atmosphere into the biosphere. To produce sugar molecules, they use energy from the light to chemically mix carbon dioxide with hydrogen and oxygen from water.

Explanation:

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relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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