3.1 Gases Test yourself

Oil and milk are examples of........................

• solids

• liquids

• gases

The opposite particle model shows...............

• solid

• liquid

• gas

In solid state, the particle are...............

• vibrating in place

• slide past each other

• move freely in all directions

In gases, the particles are..............

• tightly packed together

• closely packed

• far apart from each other

What is the layer of gases that surround the Earth called?

• Pollution

• Atmosphere

• Water vapour

When the atmosphere is dirty and harmful, we say that there is air..........................

• pollution

• conditions

• filtration

What is the gas that makes most of the air?

• oxygen

• nitrogen

• carbon dioxide

In which state the particles are close together but not packed in a fixed pattern?

• solids

• liquids

• gases

What is the state of matter that can be compressed?

• solid

• liquid

• gas

Choose all boxes that include air pollutants.

• smoke

• oxygen

• dust

• gases from factories