Post-test Solids Liquids Gases

Which is the unit for density?

• cm³

• kg

• g/cm²

• kg/m³

Which of the following represents the relationship between volume, mass and density?

• density = mass/volume

• volume/density = mass

• density = volume/mass

• volume= density × mass

How can you determine the volume of an irregular shaped object?

• Measure each side using a ruler.

• Weigh it on a top pan balance.

• Collect the water it displaces when submerged.

• Estimate it compared to another known volume.

Which of the following statements about the pressure in liquids is correct?

• The pressure in a liquid varies.

• The volume of a liquid decreases with a decrease in pressure.

• The pressure in a liquid acts equally in all directions.

• The pressure in the air is greater than the pressure in liquid.

A vacuum pump is attached to a collapsing can. Once the vacuum pump has removed the air from the can, what can be said about the air pressure inside the can?

• The air pressure outside the can is greater than the air pressure inside the can.

• The air pressure inside the can is greater than the air pressure outside the can.

• The plastic can is too weak to stay up.

• The pressure inside the can is equal to the pressure outside the can.

Which of the following statements best describes the motion of gas particles?

• They are ordered and all move in one direction.

• They have a rhythmical motion.

• They move in a random motion.

• They do not move.

Which of the following statements correctly describes how gas particles create pressure?

• Gas particles do not create pressure, it just exists.

• Gas particles collide with their container exerting a force on the walls.

• Gas particles have pressure and they pass this on to the container.

• None of the above.

Which of the following is a property of a gas?

• Gases can be compressed/squashed.

• Gas molecules have an ordered arrangement.

• Gas molecules move very slowly.

• Gases have a very high density.

Which of the following statements correctly describes the properties of a solid?

• The particles are tightly packed.

• The particles are held in a fixed pattern.

• The particles vibrate around a fixed position.

• All of the above.

A solid is heated until it turns into a liquid. What is the name of this process?

• condensation

• freezing

• melting

• boiling