2 Changing Matter & States of Matter

What is the definition of a physical change?

• A change in the size and shape of a substance
• A change in the chemical composition of a substance.

What is the definition of a chemical change?

• A change in the shape of a substance.
• A change in the chemical composition of a substance.

How do the atoms behave in a solid?

• Atoms slide against each other to fill a bottle.
• Atoms are far apart and fly around the room.
• Atoms are close together and shake.

How do the atoms behave in a liquid?

• Atoms move very fast.
• Atoms keep their shape.
• Atoms slide against each other to fill a bottle.

How do the atoms behave in a gas?

• Atoms move very fast.
• Atoms shake.
• Atoms move at different speeds.

3 properties of solids are:

• 1. take the shape of their container
  2. wet
  3. evaporate
• 1. hard
  2. keep their shape
  3. can be melted
• 1. can't be seen
  2. atoms are very far apart
  3. atoms move very fast

3 properties of liquids are:

• 1. take the shape of their container
  2. wet
  3. evaporate
• 1. hard
  2. keep their shape
  3. can be melted
• 1. can't be seen
  2. atoms are very far apart
  3. atoms move very fast

3 properties of gases are:

• 1. take the shape of their container
  2. wet
  3. evaporate
• 1. hard
  2. keep their shape
  3. can be melted
• 1. can't be seen
  2. atoms are very far apart
  3. atoms move very fast

Cornstarch slime has properties of both _______ and _______.

• gas, solid
• solid, liquid
• liquid, liquid

Going from a liquid to a solid is called _____________.

• Freezing
• Melting
• Condensation
• Evaporation