Molecule Motion

Which of the following is a correct description for solids?

• closely arranged and in fixed positions

• closely arranged and vibrate in fixed positions

• closely arranged and can move around

Which statement about the molecules in the gas carbon dioxide is correct?

• The molecules are close together.

• The molecules are diatomic.

• The molecules move randomly.

• The molecules all move with the same speed.

When something goes from gas to liquid, it is called...

• Evaporation

• Condensation

• Deposition

• Freezing

Something that goes from liquid to gas is...

• Evaporation

• Melting

• Freezing

• Sublimation

Tags

NGSS.MS-PS1-4

Which of the following sentences are true about solids?

• Solids are rigid, have a fixed shape but not a fixed volume

• Solids are not rigid, have a fixed shape and no fixed volume

• Solids are rigid, have a fixed shape and a fixed volume

Which of the following statements about the particle of a gas is true?

• Gases can be compressed because their particles are smaller than those of liquids or solids.
• Gases can be compressed because there is plenty of space between their particles.
• Gases can be compressed because they have low boiling points.
• Gases can be compressed because their particles are more elastic than those of liquids or solids.

An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?

• The particles move more slowly and become closer together.
• The particles move more slowly and become further apart.
• The particles move faster and become closer together.
• The particles move faster and become further apart. 

Tags

NGSS.MS-PS1-4

What happens when water evaporates?

• Particles of the water vapour lose energy to their surroundings.
• Particles of the water vapour are spaced further apart.
• The speed of the particles of the water increases.
• The temperature of the remaining water rises.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following statements about the particle of a gas is true?

• The particles of a gas vibrate about fixed positions.
• The particles of a gas are packed close together in a disorderly arrangement.
• The particles of a gas are far apart and move in all directions.
• The particles of a gas are stationary in an orderly arrangement.

Particles are always moving.

• True

• False

Tags

NGSS.MS-PS1-4