Question: If zinc has a positive impact on animals, then what does zinc have a positive impact on?  Answer choices: - humans  - gravity  - the skin  - density  - cells  - plants  - clouds  - animals
Answer: animals

Question: If kinetic energy  running through a wire causes that wire to heat up, then _running through a wire causes that wire to heat up?  Answer choices: - sunlight  - hydrogen and oxygen  - activation energy  - to move people  - an object  - rays or beams  - kinetic energy  - reflecting light
Answer: kinetic energy

Question: If springs can be fed from precipitation that soaks into the ground, then springs can be fed by what?  Answer choices: - mechanical waves  - vernal equinox  - precipitation  - rainfall  - digestive track  - water vapor  - aqueous solution  - carnivores
Answer:
precipitation