10 minutes maximum! Can you do it in 5?

Q1-3. The diagram show particles in 3 states of matter:

 X Y Z

1. Which of these diagrams shows the particles in a gas and a solid?

• A. 'X' shows a gas, 'Y' shows a solid.
• B. 'Y' shows a gas, 'X' shows a solid.
• C. 'Z' shows a gas, 'X' shows a solid.
• D. 'X' shows a gas, 'Z' shows a solid.

2. In which of these diagrams are the particles held in place, vibrating about a fixed point?

• A. Y only
• B. Z only
• C. X and Y
• D. Y and Z

3. When an ice cube melts, it changes from arrangement...

• A. Y to X.
• B. Z to X.
• C. Z to Y.
• D. Y to Z.

Q 4-7. These questions are about changes in state:

 4. When ice turns from a solid to a liquid, it is ? melting boiling freezing condensing subliming , 5. A gas turning back into a liquid is ? melting boiling freezing condensing subliming . 6. When frozen CO2 (dry ice) turns directly to a gas it is ? melting boiling freezing condensing subliming . 7. When liquid wax turns back into a solid it is ? melting boiling freezing condensing subliming .

8. Which of the following states of matter have no fixed shape?

• A. Liquids and gases.
• B. Solids
• C. Liquids
• D. Gases

9-10. These balloons have air inside. The air is at room temperature.

9. Which of the statements below best describes the air particles in the balloons?

• A. The particles are touching each other.
• B. The particles are widely spaced.
• C. The particles are held in a rigid shape.
• D. The particles are very close together but can slide past each other.

10. What prevents the balloons from collapsing inwards?

• A. The air particles are hitting the sides of the balloon hard, creating a force.
• B. The air particles are touching, and cannot be compressed.
• C. The air particles are vibrating, and pushing apart.
• D. The air particles stick together, and stick to the balloon.