The video tutorial explains the difference between mixtures and pure substances. It uses examples like cola, air, and salad to illustrate mixtures, while silver is highlighted as a pure substance. The tutorial also points out that money does not belong to either category.

Which of the following items was introduced first in the video?

• Silver

• Salad

• Air

• Cola

Why is money considered different from the other items mentioned?

• It is a mixture.

• It does not belong to the group.

• It is a pure substance.

• It is not a physical object.

Which of the following is a pure substance?

• Silver

• Salad

• Air

• Cola

Which of these items is a mixture?

• Silver

• Air

• Money

• None of the above

What is the common characteristic of cola, air, and salad?

• They are all metals.

• They are all mixtures.

• They are all liquids.

• They are all pure substances.