What are melting and boiling point?

Answer 1

The melting point of a substance is the (thermal) point at which a solid substance gains enough thermal energy to become a liquid.

The boiling point of a substance is the (thermal) point at which a liquid substance gains enough thermal energy to become a gas.

Boiling point of water: 100 degrees C/ 212 degrees F

Melting point of water: 0 degrees C/ 32 degrees F
Melting points and boiling points are the temperature at which substances change state.

Melting point - solid to liquid

Boiling point - liquid to gas

These temperatures will vary depending on the properties of the substance.

Answer 2

Melting and Boiling Points

When heat is transferred in a space the average energy of the particles - the temperature of the substance - is affected, by increasing or decreasing. A substance will change it's state when it reaches certain temperatures - called boiling and melting points. At everyday temperatures on Earth, most substances are either gases or solids.

Answer 3

The melting and boiling point are the temperatures at which solids melt, or liquids boil, respectively. The actual temperature varies depending upon the substance itself.