Question: - 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 What might be the last step of the process?
Answer: Pop the ice cubes out of tray.

Question: - Chemicals like sulfur dioxide and nitrogen are released into the air - These substances rise into the high atmosphere - They react with water and oxygen - This creates a more acidic rain What might be the last step of the process?
Answer: The rain with the high acid content falls.

Question: - You speak into the receiver on your phone - Sound waves move parts inside the receiver - Movement causes the magnet inside to produce eletricity - Electricity is transferred through a wire or cable - A membrane in the other persons phone is vibrated by the magnet in their telephone - Sound is produced What might be the last step of the process?
Answer:
They hear you.