Moving Particles

Argue that particles too small to see move faster when heated.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 48

All materials are made of particles too small to see. They're always moving, even in a still glass of water.
The picture shows them, much bigger than they really are. The lines show how fast they move. In warm water, they move faster.
We can't see particles, but we can see evidence. A drop of food coloring spreads much faster in hot water than in cold water.
Try it with a grown-up: put one drop of food coloring in a cup of cold water and one in warm water. Which spreads first?

Georgia Standards of Excellence in Science:

S5P1.b — Construct an argument based on observations to support a claim that the physical changes in the state of water are due to temperature changes, which cause small particles that cannot be seen to move differently.