Summary
Heat is a form of energy that helps to keep us warm, with the sun being the main source of heat and light. Temperature measures how hot or cold something is and is measured by a thermometer.
- Heat — form of energy that helps to keep us warm Example: The sun is the main source of heat and light.
- Temperature — measure of how hot or cold something is Example: Temperature is measured by a thermometer.
- Expansion — when a material gains heat and becomes bigger Example: When plastic gains heat, it expands.
- Contraction — when a material loses heat and becomes smaller Example: When plastic loses heat, it contracts.
- Good Conductors of Heat — materials that allow heat to flow through easily Example: Metals are good conductors of heat.
- Poor Conductors of Heat — materials that do not allow heat to flow through easily Example: Air, rubbers, and plastics are poor conductors of heat.
Exam Tips
Key Definitions to Remember
- Heat
- Temperature
- Expansion
- Contraction
- Good Conductors of Heat
- Poor Conductors of Heat
Common Confusions
- Mixing up heat and temperature
- Confusing expansion with contraction
Typical Exam Questions
- What is heat? Heat is a form of energy that helps to keep us warm.
- How is temperature measured? Temperature is measured by a thermometer.
- What happens to materials when they gain heat? They expand.
What Examiners Usually Test
- Understanding the difference between heat and temperature
- Identifying examples of good and poor conductors of heat
- Explaining the processes of expansion and contraction