Rocks and Weathering

11/04/23How could weathering break How could weathering break down the rocks into small down the rocks into small

pieces?pieces?

11/04/23

Rocks and WeatheringRocks and Weathering

Learning Objectives:

• To understand the terms ‘Physical weathering’, ‘Heating and cooling’, ‘Freeze-thawing’ and ‘Erosion’ and their effects on rocks.

• To explain what happens during physical weathering and that no new substance is made.

• To know some examples of where physical weathering occurs.

11/04/23

Practical Activity

Safety First: Wear safety

goggles Stand up Tuck your chair &

bags under your desk

Tie back long hair

11/04/23

InvestigationInvestigation

• Investigate the effects of heating and cooling by heating up a piece of marble/limestone.

• What happens after heating the marble?

• The piece crumbles into smaller pieces.

11/04/23

What is happening?What is happening?

11/04/23

11/04/238G Freeze-thaw

11/04/23

Weathering by ice

“Onion skin” weathering

11/04/23

Tell me why....Tell me why....

Why do mountaineers climbing mountains start early in the morning and try to complete their climb on mountain faces before midday?

Explain why rock falls are a major hazard to climbing.

11/04/23

Rocks and WeatheringRocks and Weathering

Learning Objectives:

• To understand the terms ‘Physical weathering’, ‘Heating and cooling’, ‘Freeze-thawing’ and ‘Erosion’ and their effects on rocks.

• To explain what happens during physical weathering and that no new substance is made.

• To know some examples of where physical weathering occurs.