Practice Particle Theory in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The model that explains the properties and behavior of matter by describing it as made of tiny particles in constant motion.

Everything is made of tiny particles that are always moving. How fast they move and how tightly they're held together explains solids, liquids, and gases.

Example 1

easy
State the four main points of the particle theory of matter.

Example 2

medium
Use the particle theory to explain why a gas fills its entire container, while a liquid settles to the bottom.

Example 3

medium
Use particle theory to explain why you can smell perfume from across a room.

Example 4

hard
Using particle theory, explain why increasing the temperature of a balloon causes it to expand, and predict what happens if the balloon is placed in a freezer.
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