metals and waxes
The term is actually "plastic", and many substances fit into that category, such as butter, tar, glass, iron.
carbon
When a solid is heated its particles melts and change into liquid
Snow
All matter melts, hardens, evaporates at a specific temperature, which is different for different matter. As you know the lowest possible temperature is -273,14°C or 0 K ..at this temperature all matter is solid and there is no movement on the atomic or subatomic level.
Covalent solid
It's a physical change, normally called freezing.
it depends if ice melts it turns in to water so Greenland is melting due to global warming and will soon be in the form of rivers
Sublimation - the process by which a substance goes directly from the solid to the gaseous state without passing through the liquid state.
ICE
The type of animals that are typically absent in a soft bottom subtidal community are sessile. A sessile animal is not able to move and is permanently attached to something solid.
Liquid can't melt. Melting refers to the process where solid gains enough heat and starts changing into liquid state. Liquids can only either freeze(to solid) or evaporate (to gas)