States and properties of matter 1

​Atmosphere - Layer of air around the Earth.

Compressed - Squashed.

Invisible - Can not be seen.

Pollute - Put harmful substances into water, soil and air.

​New words.

Layer - amount of substance that covers something eg a layer of icing on top of a cake.

Properties - What a substance or material is like or how it behaves.

Structure - How parts of something are arranged or put together eg the roots stem and leaves make up the structure of a plant.

​New words.

​Class discussion.

Is air a gas?

Where do we find gases?

Gases are all around us, for example air.

Gases are also in fizzy drinks and inside bicycle and car tyres.

We do not always know that gases are there because we can not see most gases.

These gases are invisible.

We also cant smell or taste many gases around us.

​Make a gas.

Resources:

Vinegar, bicarbonate of soda, a jar with a wide mouth, a spoon.

When we mix some materials, they react to make a gas. You are going to make carbon dioxide gas.

​

Procedure.

Pour some vinegar into the jar.

Put a teaspoon of bicarbonate of soda into the jar.

Observe what happens.

Learners book page 58.

Answer questions 1 and 2

​Atmosphere.

Compressed.

Invisible.

Pollute.

Layer.

Property.

Structure.

​What do these terms mean?