Weathering (AQA A-Level Geography): Flashcards
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Practise the cards
10 cards from this deck
Sub-aerial weathering definition
Sub-aerial weathering definition
Breakdown of rock at/near Earth's surface in situ
Three main categories of weathering
Three main categories of weathering
Mechanical/physical, biological, chemical
Mechanical weathering definition
Mechanical weathering definition
Physical breakdown without changing chemical composition
Water expansion % when freezing
Water expansion % when freezing
Approximately 10%
Pressure release (dilation)
Pressure release (dilation)
Removal of overlying material causes rock beneath to expand
Piddock role in biological weathering
Piddock role in biological weathering
Shellfish that bores into rock, common in chalk geology
Solution weathering process
Solution weathering process
Rock minerals dissolving in water
Rock type vulnerable to oxidation
Rock type vulnerable to oxidation
Ferrous (iron-rich) rocks
Product of carbonation on calcium carbonate
Product of carbonation on calcium carbonate
Calcium bicarbonate, which dissolves easily in water
Cause of enhanced acid rain
Cause of enhanced acid rain
Industrial activity releasing sulphur dioxide & nitric oxides