Unit 5. Matter and energy

A physical combination of two or more substances. It's a...

In an homogeneous mixture we can't see the different substances

• True

• False

A brownie is a...

• homogeneous mixture

• heterogeneous mixture

We use _____________________ to remove small particles from liquids and gases.

• Evaporation

• Decantation

• Magnetic separation

• Filtration

We use this type of separation when there are two types of liquids that have different boiling points.

• Decantation

• Evaporation

• Distillation

• Filtration

We can use ______________________ to separate liquids with different densities.

The atoms are close together, but move around freely --> Stable volume, but can change shape.

• Gas

• Liquid

• Solid

The atoms move quickly in all directions --> Don't have a stable shape or volume.

• Ice

• Water

• Gaseous steam

These changes can be reversible and irreversible

• Physical changes

• Chemical changes

• Heat

• Light

It's the amount of physical space that an object occupies

• Mass

• Volume

• Density