In which state of matter are particles very close together?

• Solids

• Gases

• Liquids

What can particles in a solid do?

• Expand to fill the container

• Vibrate in a fixed position

• Move freely

How do particles in liquids compare to those in solids?

• They are further apart

• They are closer together

• They are in a fixed pattern

In which state of matter do particles move very fast?

• Gases

• Liquids

• Solids

What is a characteristic of gases?

• They have no shape of their own

• They can not be compressed easily

• They have a fixed shape

What is the arrangement(排列) of particles in solids?

• Random and free

• In a fixed pattern

• Far apart

What happens to the particles in a gas?

• They move freely in all directions

• They cannot move

• They vibrate in place

Why can't solids be compressed/squashed easily?

• Particles are in a liquid state

• Particles are tightly packed

• Particles are far apart

What is the main difference between liquids and gases?

• Liquids can flow and take the shape of their container

• Gases have particles that are closer together

• Liquids have a fixed shape

What do particles in liquids do compared to those in solids?

• Vibrate in a fixed position

• Move freely and slide past one another

• Have no shape