After watching this video lesson, you will be able to:
1. Describe the effects of heat on substances - changes in physical state (melting/freezing, boiling/condensation), temperature, chemical structure, size and density.
2. Define melting, freezing, boiling or ebullition, melting point, freezing point, boiling point, and density.
3. Describe experiments to demonstrate that
* freezing point and melting point are the same for a given substance and use it to determine the melting point of wax.
*solids, liquids and gases expand on heating and contract on cooling
*different substances expand at different rates on heating.
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