Chemistry--Classification and Changes in Matter A

Which of the following is not a substance?

• copper

• water

• sugar-water solution

• carbon dioxide

Which of the following may be heterogeneous as well as homogeneous?

• mixtures

• compounds

• elements

• solutions

Which substance can be decomposed by a chemical change?

• silver

• lead

• sugar

• hydrogen

Which of the following is an example of a physical change?

• wood burning

• food digesting

• water freezing

• iron rusting

Which of the following substances consists of only one kind of atom?

• elements

• compounds

• solutions

• mixtures

Which of the following are heterogeneous mixtures? There may be more than one answer.

• water

• sugar-water solution

• tossed salad

• oxygen

• iron

Which of the following are homogeneous mixtures? There may be more than one answer.

• water

• sugar-water solution

• tossed salad

• oxygen

• iron

Which of the following are substances? There may be more than one answer.

• water

• sugar-water solution

• tossed salad

• oxygen

• iron