rocks and weathering
DESCRIPTION
Introduction to rocks and weathering. Physical weathering including freeze-thaw and heating and cooling.TRANSCRIPT
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.
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Practical Activity
Safety First: Wear safety
goggles Stand up Tuck your chair &
bags under your desk
Tie back long hair
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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.
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What is happening?What is happening?
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11/04/238G Freeze-thaw
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Weathering by ice
“Onion skin” weathering
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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.