Problem: - A large rocky area is formed - The rocky area has a higher elevation than the surrounding areas - Water from precipitation falls in the area - The water forms a stream - The stream flows towards lower elevation - The stream becomes a river - The river continues to flow along the same path for a long time - The river erodes the rocky area that it touches What might be the last step of the process?

A: The eroded area cuts deeply into the rock.
Problem: Given the question: - Some of the rock in the ground is made of limestone - Over long periods of time rain can hit the limestone - And cause a acidic reaction - The limestone will slowly disintegrate - A large gap with be where the limestone was What might be the last step of the process?
++++++++++++++++++++++++++++++++
The answer is:
Result in the cave.
input question: - A fuel is heated in an oven - Above the oven is a tank of water that is sealed - The tank of water begins to boil above the oven - A the water boils steam is created - The steam is denser than air so it needs a place to go - The steam is forced out of the tank and into a piston - The piston moves up - The valve of the piston closes - The valve on the next piston opens What might be the last step of the process????
output answer: The steam fills the next piston, driving it up, and the other one down
- Sunlight passes through the glass into the greenhouse - The plants and floor absorb the the sunlight - The absorbed sunlight is converted to heat - The heat cannot escape the glass - The heat is trapped in the greenhouse - The hot air rises - The colder air at the top is pushed to the bottom What might be the last step of the process?
----
Answer: The colder air is then warmed by the floor and the plants.
Q: - Air is drawn in through the mouth - The air goes down the esophagus - The air moves into the lungs - The carbon dioxide is removed - The remaining oxygen enters the body What might be the last step of the process?
A: The remaining carbon dioxide is expelled through the mouth.
[Q]: - Acid rain is produced by chemicals that reach into the atmosphere - Falls onto the ground - The acid rain starts scouring rocks - Destroys vegetation What might be the last step of the process?
****
[A]:
The lack of vegetation alters the surrounding environment.