Thermodynamics: Heat and Temperature (for a 6-year-old)
Thermodynamics is a big word that talks about heat — how things get warm or cool.
Easy ideas to understand
- Tiny wiggles: Everything is made of lots of tiny pieces (like tiny balls) that wiggle. When they wiggle more, the thing is hotter.
- Temperature: Temperature tells us how hot or cold something is. A thermometer is like a number that shows the wiggliness.
- Heat: Heat is the wiggle-energy that can move from one thing to another.
- Heat moves from hot to cold: If you touch a warm cup, your cooler hand gets warmer because heat moves into your hand. Heat does not move from cold to hot by itself.
- What heat can change: Ice can melt into water when it gets heat. A balloon with warm air can get a little bigger.
Simple and safe things to try (ask an adult to help)
- Put one spoon in warm (not too hot) water and one spoon in cold water. Touch the handles carefully and feel which is warmer.
- Put an ice cube on a plate and watch it slowly melt into water. Talk about how the ice got heat from the air and melted.
- Breathe on your hand — you will feel warm air. That is heat from your breath.
Safety
Always ask an adult before touching hot things like kettles, stoves, or hot water.
One-sentence summary
Heat is the energy that makes things warm, temperature tells us how warm they are, and heat moves from hot things to cold things.