Y7 Weathering

What does weathering mean?

• when rocks are moved from one place to another

• when rocks are blown away by the wind

• when rocks are broken down where they are

• when rocks are built up

What type of weathering is this picture?

• Onion skin weathering

• Freeze-thaw weathering

• Biological weathering

• Chemical weathering

What type of weathering is this picture?

• Onion skin weathering

• Freeze-thaw weathering

• Biological weathering

• Chemical weathering

What type of weathering is this picture?

• Onion skin weathering

• Freeze-thaw weathering

• Biological weathering

• Chemical weathering

What type of weathering is this picture?

• Onion skin weathering

• Freeze-thaw weathering

• Biological weathering

• Chemical weathering

How far does water expand by when it freezes?

• 1%

• 5%

• 10%

• 15%

Rainwater has acid in it. True or false?

• True

• False

Biological weathering is when....

• plants make rocks with their roots

• plants and animals break down rocks

• animals pick up rocks and move them

• chemicals break down the rock

Chemical weathering is when...

• ice enters the gaps in the rock and expands

• animals break down the rock

• chemicals in rainwater break down the rock

• plants break down the rock

Onion skin weathering is when...

• layers of the rock break down due to being heated and expanding

• layers of the rock are eaten by animals

• rocks are broken down by chemicals

• rocks are broken down by ice