Grade 7 - States of Matter - Exercise

Front

Which change of state occurs when particles in a solid begin to move slowly past each other?

Back

Melting

Front

What happens to the particles of a liquid when its temperature is increased a little?

Back

They start vibrating more

Front

What happens to the particles in a liquid when it is heated and its volume increases?

Back

They are moving faster

Front

An example of a substance that is freeze is...

• milk
• Fog
• Steam
• Ice cube

Back

Ice cube

Front

All solids, liquids and gases are made up of...

Back

Particles

Front

What change of state do you see from this picture?

Back

liquid to gas

Front

What change of state do you observe when water vapor comes into contact with the lid?

Back

Condensation

Front

This is condensation. The change of this state occurred because the water vapor...

Back

came into contact with a cool surface

Front

In the gas state, the water particles...

Back

move quite rapidly and sometimes collide

Front

Unlike liquid water, water vapor can spread everywhere because the particles...

Back

move freely in all direction