Answer:
Explanation:
During that process of being exposed to air and water while being left outside or in the elements for an extended period of time, a variety of different types of rusts can form, but the most common form is Fe2O3. Rust only forms on the outside of a metal surface because it requires exposure of oxygen and water to rust.
I think its the mass that changes but im not sure
Answer:
superstition
Explanation:
Because there is no scientific reason behind it and no connection of it to science.
Increase, because you need heat to melt a solid to a liquid, so the temperature will have to get greater.
