Q: What is the final step of the following process: - Limestone is located under the soil - Rain picks up carbon dioxide as it falls to earth - The rain falls on the soil over the limestone - The carbon dioxide in the rain washes through the soil - The carbon dioxide turns into acid - The acid in the rain gets to the limestone below the soil - The acid dissolves the limestone - Acid continues to erode the limestone with more rain over time
A: The eroded limestone sometimes forms caves.

Q: What is the final step of the following process: - A can is thrown away into a recycling bin - The can is taken to a recycling center - Melted down along with other cans - The melted metal is turned into bars
A: Becomes material for other products.

Q: What is the final step of the following process: - Get an ice cube tray - Fill the tray with cool water - Place the tray in the freezer - Leave the tray in the freezer for a few hours - Take they tray out of the freezer
A: Pop the ice cubes out of tray.

Q: What is the final step of the following process: - Electrical signals in the brain travel through nerves to muscles - Two types of proteins exist in filaments in the muscles - The filaments move when the brain instructs them to - The motion of the filaments cause the muscle to shorten and contract
A:
Opposing pairs of muscles exist in order to provide the necessary range of motion.