Q: - Oil is gathered through mining operations - The oil is transported to stores - Oil is purchased by homeowners - Oil is placed into a stove in the house - The oil is lit on fire, and burns for a long time What might be the last step of the process?
A: The warm air off of the oil travels through the house

Q: - Coal is heated in the boiler - The water tank over the boiler is heated - Creates steam - The steam is funneled to the piston - Piston uses the steam as energy What might be the last step of the process?
A: The piston causes the crankshaft to move.

Q: - 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?
A: The carbon atoms rearrange to become a new substance.

Q: - Humans are born as babies - Babies become infants - Infants become children - Children learn skills - Children become teenagers - Teenagers undergo puberty - Teenagers become adults - Adults have children - Adults become elderly What might be the last step of the process?
A:
Elderly humans die.