Temperature and Heat
Temperature measures how hot something is, while heat is the energy transferred because of a temperature difference.
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Temperature measures how hot something is, while heat is the energy transferred because of a temperature difference.
- Heat flows from hot to cold
- Temperature relates to average particle energy
- Measured in degrees Celsius or kelvin
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Temperature and Heat?
Within Physics, which covers forces, energy, waves, electricity, magnetism, light and space explained through motion and experiments, this topic explains Temperature and Heat. Physics topics explain how things move, push, heat up and carry energy, so each one here pairs a definition with a live model you can change.
Check that you can explain Temperature and Heat in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Temperature and Heat explains how the physical world behaves, from sport and transport to electricity and medicine.
Temperature and Heat in detail
Temperature measures how hot or cold something is, related to the average kinetic energy of its particles, and is measured in °C or kelvin (K = °C + 273). Heat, or thermal energy, is the total energy transferred between objects at different temperatures, measured in joules.
Heat always flows from hotter to cooler objects until they reach thermal equilibrium. A bath of warm water holds more thermal energy than a cup at the same temperature because it has more particles. Distinguishing temperature from heat is central to thermal physics.
How the interactive helps you understand Temperature and Heat
Watch the gas particle model in the interactive. Use any sliders or buttons it offers to change the values and see how the gas particle model responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Temperature and Heat.
Real-life uses and examples
- Answer “explain” questions by linking Temperature and Heat to a clear cause and effect.
- Predict what a ball, car or circuit will do with Temperature and Heat before you do the calculation.
- Explain everyday devices, such as brakes, lifts or chargers, using Temperature and Heat.
Common mistakes to avoid
- Forgetting that some quantities, such as force or velocity, also have a direction.
- Mixing up Temperature and Heat with a related quantity that has different units.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Temperature and Heat
What is Temperature and Heat?
Temperature measures how hot something is, while heat is the energy transferred because of a temperature difference.
What are the most important points about Temperature and Heat?
The main points are: Heat flows from hot to cold; Temperature relates to average particle energy; Measured in degrees Celsius or kelvin.
Why is Temperature and Heat useful?
Understanding Temperature and Heat explains how the physical world behaves, from sport and transport to electricity and medicine.
How can I practise Temperature and Heat?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Temperature and Heat?
Related topics in Physics include Thermal Conduction, Gas Laws, The Wave Equation.