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Chapter 8
Revise heat.
| Question | Answer |
|---|---|
| What is heat? | Heat is a form of energy. |
| Give an example of heat being converted into another form of energy. | Light bulbs heat up a filament until it glows and gives off light. |
| What is temperature? | Temperature is what we use to measure the levels of heat in a substance. |
| What instrument measures temperature? | A thermometer. |
| Explain the difference between temperature and heat. | Temperature is the numerical measure of heat. Heat is the form of energy. |
| What is the boiling point and melting point of water. | Boiling: 100°C Melting: 0°C |
| What happens when substances change state? | It has to take in or give off energy to change to either a liquid, solid, or gas. |
| What happens when substances change state? | When a substance looses enough heat energy it will change to a solid instead of a liquid. |
| What is condensation? | Condensation is when a vapour comes in contact with a cold surface or other gas and becomes a liquid |
| What is Latent heat? | Latent heat is heat that is left inside a substance and has not been able to cool fully. |
| How can you identify Latent heat on a graph? | The graphs curve will go flat before dropping temperature once the latent heat is gone. |
| What is an insulator? | An insulator is something that stops or reduces heat transfer from one substance to another. |
| Define the terms conduction. | Conduction is heat transfer through physical contact. |
| Define the terms convection. | Convection is heat transfer through a gas. |
| Define the terms radiation. | Radiation is heat transfer through light. |
Created by:
SC Dave
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