Section 1.2 Evidence for Particles

Question 1

Why can you smell a cake baking, even though you are not in the same room?

Answer 1

The cake gives of invisible particles of itself, these particles mix with the gas particles in the air. This is called diffusion

Question 2

What is diffusion?

Answer 2

The net movement of particles from an area of high concentration to an area of low concentration

Question 3

Why don’t you need to mix particles of a liquid or gas in order for it to diffuse?

Answer 3

The particles in liquids and gases move constantly in random manner, eventually the particles will be spread evenly

Question 4

In which state of matter does diffusion occur the quickest? (liquid or gas?)

Answer 4

Diffusion takes place quicker in gas than liquid as the particles of a gas move much quicker than the particles of a liquid

Question 5

Does the size and weight of the particles affect the rate of diffusion?

Answer 5

Smaller and lighter particles diffuse faster than larger and heavy ones