PH-444
Brownian motion
Physics · Secondary 3 · Medium · Brownian motion
A teacher shows pollen grains in water moving in a continuous, random zig‑zag path under a microscope. How does this Brownian motion provide evidence for the kinetic particle model of matter?
- It shows that water molecules are fixed in position in a regular pattern.
- It shows that visible particles are made of smaller, charged particles.
- It shows that water consists of tiny molecules moving randomly all the time.
- It shows that gravity is the only force acting on the pollen grains.
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