It is heterogeneous mixture because you can separate them.
because you can hammer it and change it permanitly
This is a solid because you can no change it like a liquid.
because it contains calcium
Fireworks contain sulfer and that makes it explode.
the salt contains iodine.
water is a liquid and liquids are not solid
Fire works are a chemical change diffrent chemicals create diffrent colors.
Coffee is homogeneous because the sugar and creamer mixes together.
the diamonds are a pressurised form of coal.
When the ice melts it changes its physical state.