Particle theory

Particles

Lesson 1 - The particle model

Particle Theory overview

• We know that all matter is made up of particles and we can use this to explain the properties of solids liquids and gases.

• Particle arrangement in solid's are really close together, in liquids they have more room between them and in gases they are more freely moving and further apart.

• More energy = More movement of these particles, more room between particles.

• Less Energy = Less movement of these particles, less room between particles.

• Heat is one thing which can greatly increase the energy in any substance.

Multiple Choice

All matter is made up of tiny _______________

• energy

• particles (atoms and molecules)

• bits

• antimatter

Multiple Choice

As particles are exposed to warmer temperatures they __________

• speed up
• slow down
• stay the same
• vibrate

Multiple Select

Which states of matter are freely moving?

• Gases

• Liquids

• Solids

Multiple Select

Which of these has no fixed shape?

• Solid

• Liquid

• Gas

Multiple Choice

Only one of these can be compressed, tick which one you think is correct?

• Solid

• Liquid

• Gas

Changing state

Please take a few minutes to draw this diagram in your books (it does not have to be detailed.

Multiple Choice

What is the term given to the temperature at which a solid turns into a liquid?

• Boiling point

• Melting point

• Freezing point

• Heating point

Multiple Choice

The process when a liquid turns into a gas

• Evaporation

• Melting

• Condensation

• Deposition

Multiple Choice

The process when a gas turns into a liquid

• Condensation

• Sublimation

• Freezing

• Evaporation

Multiple Choice

The process when a solid turns into a liquid

• Evaporation

• Sublimation

• Freezing

• Melting

Diffusion

If food dye is carefully dropped into water, you see the dye start to spread out because the particles move freely.

Multiple Choice

As particles are exposed to colder temperatures they _____

• speed up
• slow down
• stay the same
• become ions

Multiple Choice

Particles at a higher temperature, move _____________ than those at a lower temperature.

• faster

• slower

Multiple Choice

Particles are always moving.

• True

• False