A chemical change occurs when a substance changes form but keeps its original properties. t or f

False

Explanation:

When a chemical change occurs, the chemical composition is altered forever. For example, when you bake a cake, you cannot undo the changes to remove the eggs, oil, flour, etc. On the other hand, a physical change can be something such as a haircut, or trimming your nails. These things only change the appearance, not the chemical composition.

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )