Grade 8 8I Review

States of matter vary in the way they maintain(or don't) their...

• volume

• mass

• shape

• atoms

Which state of matter will keep its volume, but not its shape if it changes containers?

• Solid

• Liquid

• Gas

This theory explains the properties of different states of matter

• Atomic theory

• Property theory

• Matter theory

• Particle theory

A substance can diffuse (do diffusion) in which states of matter?

• Solid

• Liquid

• Gas

What term describes the random movement of particles in a liquid or gas?

• Brownian Motion

• Diffusion

• Movement

• Spreading

Most substances _________ when heated and ________ when cooled (get colder)

• expand; don't change

• expand; contract

• contract; expand

• Don't change; expand

A substance expands because the particles...

• Move faster and take up less room

• move slower and take up more room

• Move faster and take up more room

• move slower and take up less room

What is density?

• The amount of atoms in a certain compound

• The amount of mass in a certain volume

• The amount of mass in a certain time

• The amount of atoms at a certain temperature

What weighs the most (has the biggest mass)?

• 50g of metal

• 2kg of water

• 900g of wood

• 7kg of air

What takes up the least space (smallest volume)?

• 50g of metal

• 2kg of water

• 900g of wood

• 7kg of air