Question

How do you know that melting ice is a physical change?

Use words to describe what energy is

What type of energy causes a rain puddle to disappear on a sunny day?

A plumber uses a torch to heat a copper pipe in order to bend it. Is this an example of a physical change? Explain

Compare the properties of broken and unbroken glass. Explain why breaking glass is a physical change.

Answer 1

the last one:

when the glass is broken, it's not changing into a new substance, just changing its form. so the only difference is the fact that they are broken or not

Answer 2

How do you know that melting ice is a physical change?
Because you're not adding another substance to the ice so the properties still remain the same of the ice, it's just changing it's form