Fluids -Quick Quiz

These statements are about the particle model of matter. Which one is not correct?

• Liquids are hard to compress because their particles are very close together.

• Gases expand to fill their container because there are only weak forces between the particles.

• Liquids can flow because there are only very weak forces between the particles.

• Solids have a fixed shape because there are very strong forces between the particles.

Why do solids expand when they are heated?

• The particles get bigger.

• The particles vibrate more and take up more space.

• The particles vibrate more and get closer together.

• The particles stick together.

Density is:

• the weight of a fixed mass of something.

• the volume of a fixed weight of something.

• the weight of a fixed volume of something.

• the mass of a fixed volume of something.

What happens to the density of a block of iron when it is heated?

• It increases, because the volume increases.

• It increases, because the volume decreases.

• It decreases, because the volume increases.

• It decreases, because the volume decreases.

When liquid water changes into steam it is:

• evaporating.

• condensing.

• melting.

• dissolving.

Tags

NGSS.MS-PS1-4

What happens to the temperature of the water in a beaker when it is boiling?

• It goes up.

• It stays the same.

• It goes down.

• It all depends on how hot the water was to start with.

In what way is ice different to other solid materials?

• It is colder.

• It occurs naturally.

• Ice (solid water) is less dense than liquid water.

• The density of ice does not change when it is cooled down.

Tags

NGSS.MS-PS3-4

Jo heats a beaker of water and draws a graph to show how its temperature changes. Which sentence explains the shape of the graph at point X?

• The particles in the solid are breaking apart and releasing energy.

• The liquid is giving out the energy needed to break the bonds between particles.

• The energy is breaking the bonds between the particles in the gas instead of making the gas hotter.

• The energy is breaking the bonds between the particles in the liquid instead of making the liquid hotter.

The pressure in liquids and gases is caused by:

• the particles pressing down.

• the particles pushing up.

• the particles moving sideways.

• the particles moving in all directions and colliding with things.

When a gas is compressed:

• the particles bump into the walls of the container less often.

• the pressure drops.

• the particles become more spread out.

• the pressure increases.