7G Particle Model

What are the three states of matter?

• air, water, fire

• solids, liquids, gases

• ice, water, steam

• USA, UK, UAE

Which of these materials will have the most similar properties?

• air, oxygen, ice

• water, iron, air

• iron, stone, wood

• oil, water, wood

All liquids:

• have a fixed volume and take the shape of their container

• have a fixed volume and a fixed shape

• will spread out until their volume has doubled

• can change their volume but not their shape

Which of these states of matter are usually difficult to compress (squash)?

• solids only

• liquids only

• solids and liquids

• solids, liquids and gases

The particles in solids:

• do not move at all

• vibrate in one place

• can move past each other

• can move freely in all directions

Which is the best description of a solid?

• the particles are very close together

• the particles are as far apart as possible

• the particles are quite close together

• there are no particles

In which state are the particles close together but can still move past each other?

• gases only

• liquids only

• solids only

• all three states

A gas can be squashed because:

• the particles are held tightly in place

• there are no particles

• the particles are far apart

• the particles are squishy

Brownian motion is observed when:

• a gas spreads out in a room

• two liquids are mixed together

• a tea bag is placed in hot water

• pollen grains are floating in water

To observe Brownian motion you need to:

• use a microscope

• measure distance accurately

• observe carefully for a few days

• heat different solids, liquids and gases