Question: - Blood enters the kidney - The blood travels into the neophrons - Waste is expelled via the neophrons - The waste goes to the bladder in the form of urine What might be the last step of the process?
Answer: The clean blood exits the kidneys.

Question: - A conducting metal, like copper, is wrapped around a piece of metal - An electrical source, like a battery, produces an electrical current - The electrical current flows through the wire - The electrical current creates a magnetic field around the wire, magnetizing the metal What might be the last step of the process?
Answer: The magnetic field can be turned on and off by starting or stopping the electricity source

Question: - An isotope has too many protons - The isotope is unstable - The isotope emits radiation - The isotope decays - The isotope loses some atomic particles - The isotope turns into a different element What might be the last step of the process?
Answer:
The isotope is finished decaying and emitting radiation.