-  Food enters the body - Food begins to be processed by the digestive system - The pancreas releases enzymes to aid digestion - Digested food affects the amount of sugar in the blood - The pancreas releases one hormone to lower the blood sugar (glucose) level  What might be the last step of the process?
Ans: The pancreas releases another hormone to raisethe blood sugar (glucose) level.

-  The sun gives off radiation - The radiation is aborbed by the Earth - Some of the radiation goes back into space - Some is trapped by the atmosphere - If too much heat is trapped  What might be the last step of the process?
Ans: Global warming occurs.

-  You breathe oxygen into your body through the nose or mouth - The oxygen travels to the lungs through the windpipe - The air sacs in the lungs send the oxygen into the blood stream - The carbon dioxide in the blood stream is transferred to the air sacs  What might be the last step of the process?
Ans: The lungs expel through the nose or mouth back into the environment.

-  Plants and animals long ago died - They are buried under layers of soil - Pressure builds over time - The remains liquefy  What might be the last step of the process?

Ans: The carbon atoms rearrange to become a new substance.