Substances and Mixtures

Which of these are NOT example of matter?

• solid

• energy

• liquid

• forces

• gas

A substance can be an element or a __________.

True or False: Salt is a compound.

• true

• false

A heterogeneous mixture:

• is evenly mixed

• has invisible particles

• is unevenly mixed

• is a solution

Examples of homogeneous mixtures are:

• salad

• soup

• chocolate chip cookies

• chocolate

Salt water can be separated by:

• magnets

• evaporation

• strainers

• lifting off

Sand and Iron can be separated by:

• magnets

• strainers

• crystallisation

• lifting off

The chemical formula N₂O is for

• Nitrous oxide

• Nitrogen dioxide

• Dinitrogen trioxide