Plants, which are part of the biosphere, take in carbon dioxide (CO2) from the air to help them make their food through a process called photosynthesis. When they respire, they release some of that CO2 back into the air. When plants die and decay, their carbon goes into the ground and can turn into fossil fuels over a long time. When we burn these fossil fuels, they release CO2 into the atmosphere again. Some of this CO2 also mixes with water, forming something called carbonic acid. Meanwhile, aquatic plants in the water do their own photosynthesis and respiration too. This whole process of carbon moving around helps connect all the different parts of the Earth, like the land (lithosphere), the air (atmosphere), and the water (hydrosphere).
make this text sound like a 7th grader wrote it Plants (biosphere) take up the atmospheric CO2 for photosynthesis and give it out during respiration. The carbon in decaying plant material is transferred to the lithosphere (ground) to form fossil fuels. Burning of fossil fuels releases CO2 into the atmosphere. CO2 dissolves into hydrosphere (water) forming carbonic acid, while the aquatic plants undergo photosynthesis and respiration. This continuous exchange of carbon connects biosphere, lithosphere, atmosphere, and hydrosphere.
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