A1. Atoms can be seen under a light microscope.

• True

• False

A2. Ice and liquid water are made up of the same particles.

• True

• False

[E] A3. A balloon has a greater mass when it is inflated than when it is not inflated.

• True

• False

[E] A4. The pressure of the gas in a balloon increases with its temperature.

• True

• False

[E] A5. When a piece of iron is heated, its density decreases.

• True

• False

B1. Answer the following question.

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only

B2. Answer the following question.

• A. (1) only

• B. (3) only

• C. (1) and (2) only

• D. (2) and (3) only

B3. Which of the following about the shape and volume of a liquid is correct?

• Shape:Fixed, Volume:Fixed

• Shape:Fixed, Volume:Not fixed

• Shape:Not fixed, Volume:Fixed

• Shape:Not fixed, Volume:Not fixed

B4. Answer the following question.

• A

• B

• C

• D

B5. Which of the following diagrams can show the arrangement of particles in a solid?

• A

• B

• C

• D