[Q]: -  Food is put into mouth - Food is chewed and mixed with saliva (spit) - Food travels down the esophagus (throat) - Food travels into the stomach - Acid in the stomach breaks the food down further - Food travels into the small intestine - Nutrients from food are absorbed into the blood stream - Food travels into the large intestine - Most of the remaining material is now waste  What might be the last step of the process?
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[A]: The waste is eventually removed from the body.


[Q]: -  The gravity of the sun pulls its mass inward - There is a lot of pressure on the Sun - The pressure forces atoms of hydrogen to fuse together in nuclear reactions - The energy from the reactions gives off different kinds of light  What might be the last step of the process?
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[A]: The light travels to the Earth.


[Q]: -  Coal is burned in a boiler - Steam is produced under pressure - Flows into a turbine - The turbine spins  What might be the last step of the process?
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[A]: Creates electricity.


[Q]: -  People breathe and expel carbon dioxide - Engines produce carbon dioxide - Living things produce waste - Waste decomposes - Decomposition produces methane - Water evaporates - Water vapor joins the atmosphere  What might be the last step of the process?
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[A]: