Because they all have different densities. If you have milk and peanut butter in different bowls the milk will be a lot easier to get off than peanut butter because of the density dofference. Does this help at all?
Answer:
There are five signs of a chemical change:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
Precipitate (formation of a solid)
Explanation:
learned and found it in my journal.
