Unit 3: Getting materials right

Where does wood come from?

Is rock a natural material or a made material?

Name a type of rock.

What else can we use rubber for?

Metal is strong but it has other characteristics.



Is metal waterproof or absorbent?

Metal is strong but it has other characteristics.



What other characteristics does metal have?

Metal is a sensible material for a bike because of the properties of metal.
Rubber is a silly material for a bike.



What would happen if a bike was made of rubber?

Metal is a sensible material for a bike because of the properties of metal.
Rubber is a silly material for a bike.



What would happen to a table made of chocolate?

Zara and Marcus want to know which cushion is the softest.

They put a rock on each cushion to see how far it goes down.

They use a ruler and some bricks to measure how far down the rock goes.

Zara and Marcus make a block graph of their results.





Which cushion is the softest?

Zara and Marcus want to know which cushion is the softest.

They put a rock on each cushion to see how far it goes down.

They use a ruler and some bricks to measure how far down the rock goes.

Zara and Marcus make a block graph of their results.





Which cushion is the hardest?

Arun is making a cake. He has some solid materials: flour, sugar, butter and chocolate. He breaks some eggs. These are a liquid.

He changes these materials to make the cake.

First, he makes a mixture of three different materials. He mixes the sugar and butter together, then adds the eggs.

Next, he makes the chocolate melt by making it hot. The solid chocolate changes into liquid chocolate.

Then he adds the liquid chocolate and the flour to his mixture.

Now he heats the mixture in the oven. The heat makes the liquid egg change into a new solid material. This new material holds the other materials together so the cake can keep its shape.

Which material changed from a solid to a liquid when it was heated?

Arun is making a cake. He has some solid materials: flour, sugar, butter and chocolate. He breaks some eggs. These are a liquid.

He changes these materials to make the cake.

First, he makes a mixture of three different materials. He mixes the sugar and butter together, then adds the eggs.

Next, he makes the chocolate melt by making it hot. The solid chocolate changes into liquid chocolate.

Then he adds the liquid chocolate and the flour to his mixture.

Now he heats the mixture in the oven. The heat makes the liquid egg change into a new solid material. This new material holds the other materials together so the cake can keep its shape.

Which material changed from a liquid to a solid when it was heated?

We know that paper is made from wood. Trees are cut down to make paper. This is bad for forests and for the animals and plants that live in forest habitats.

But we can recycle used paper to make new paper. This saves trees.

We know that plastic is made from oil. Oil comes from underground. Getting the oil out causes pollution. Used plastic is often dropped as litter. There is now lots of plastic pollution in our rivers and in the sea.

But we can recycle used plastic to make new plastic. This mean less pollution.

Science teaches us that we are damaging our world.

Science teaches us that we should use recycled paper and plastic and we should not drop litter.

Use books or the internet to find out some other things we should do to help our planet.

Make a poster to tell others how they can help save planet Earth.

Tell people:

- how they can save trees
- how they can make less pollution
- why they should not drop litter.

Which of these materials are natural and which have been made?



*Choose the natural materials. The others have been made.*

Three of these materials have been made.
What natural materials have they been made from?

Name two characteristics of these materials.
The first one has been done for you.

plastic, metal, glass, paper, rock

Plastic is smooth and shiny.

Put the objects into the correct group

cotton T-shirt, wooden pencil, stone, metal paperclip, plastic ruler

Which of these changes makes a new material?

What happens to these materials when we heat them?

a egg

What happens to these materials when we heat them?

b ice