Q: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?
A: Metal is a conductor and completes a circuit when you plug it into the outlet.
Q: Which example describes an organism taking in nutrients?
A: a girl eating an apple
Q: A family installs a new heating system in their home. Which is the most desirable result of the new heating system?
A: decreasing the amount of energy used
Q: Natural processes cause rapid and slow changes to Earth's surface. Which event causes changes to Earth's surface most rapidly?
A:
an earthquake shaking the ground