Complete the 2 key definitions on the companion sheet.
What exactly is a melting or boiling point?
Watch through the intro video and then answer the questions on the companion sheet
Answer the questions on the companion sheet to show that you grasp the concept of pure and formulated substances.
Look at the graphs below. they show hoe the temperature of a substance changes over time.
On your companion sheet, link this informations to your knowledge of Specific laten heat
(Physics topic on particles and energy transfers).
What does each graph say about the substance that is cooling down?