Question

When you change the amount of a substance, the boiling and melting points

go up
go down
become the same temperature
remain the same

Answer 1

do anybody know

Answer 2

I know.

Answer 3

This question is a bit strange, but dealing with what you have given, melting point and boiling points ate both intensive properties, which means they are independent of amount of stuff present such as mass.

Answer 4

If you were to put a large pot of water and a small pot of water on the stove at the same time, will the two pots of water boil at different temperatures?