Basic Kinetic Theory

What is the name of the the theory that describes how particles within substances act?

• Kinematic Theory
• Kinetic Theory
• Kinetic Energy
• Kinematic Energy

What is the definition of a particle?

• The smallest part of a substance that can be repeated to make the whole substance. 
• The smallest part of an element that can exist.
• A substance that cannot be broken down into other substances.
• A force that joins atoms together in a substance.

The phases of a substance are

• Cold, Medium, Hot
• Low Energy, Medium Energy, High Energy
• Solid, Liquid, Gas
• Closely packed, not too far apart, far apart

What phase is this describing?
Has no definite shape,
Has a definite volume,
Particles move quickly,
Particles have strong forces between them

• Solid
• Liquid
• Gas
• None!

What phase is this describing?
Has no definite shape,
Has no definite volume,
Particles move very quickly,
Particles have weak forces between them

• Solid
• Liquid
• Gas
• None!

What phase is this describing?
Has a definite shape,
Has a definite volume,
Particles move very quickly,
Particles have strong forces between them

• Solid
• Liquid
• Gas
• None!

True or False?
The particles in a liquid are travelling at very high velocities, allowing them to break the attractions between each other. This means particles can move through the liquid and hence a liquid’s shape can change. 

• True
• False

True or False?

Gas particles only take up 0.1% of a gas, the other 99.9% is empty space! 

• False
• True

True or False?
In a solid, particles are usually shown packed closely together in very orderly planes. There are no spaced between the particles.

• True
• False

What happens during a state or phase change of a solid to a liquid?

• The substance continues to get hotter as more heat energy is transferred to the substance while the solid is melting. Particles move further apart and can now slide over each other.
• The temperature stays the same while the solid is melting. The substance is not being heated any more as the heat energy is making the bonds join so the particles break away from their fixed position allowing them to slide over each other
• The substance continues to get hotter as more heat energy is transferred to the substance while the solid is freezing. Particles move further apart and can now slide over each other.
• The temperature stays the same while the solid is melting. The substance is still being heated but the heat energy is making the bonds break so the particles break away from their fixed position allowing them to slide over each other