weathering and erosion
Post on 16-Dec-2014
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What is happening to the rock in all three cases?
Erosion = ROCKS WEAR AWAY
Weathering = ROCKS BREAK UP
Date
The difference between weathering and erosion
Now the difficult bit….Rivers erode in 5 main ways:
Write this down under your previous note about weathering and erosion – LEAVE 2 LINES
BETWEEN EACH NUMBER
Can you think of what some of them might be?
1. The river ‘bashes’ sand and stones against the banks
2. As river water is acidic, it can dissolve the banks away
3. The water itself forces cracks apart
4. As they get washed along by the river, stones knock into each other
5. The river scrapes stones along its bed
Can you match the words to the meanings?
attritionhydraulic action corrasion
corrosion abrasionNow add the terms to your notes
1. The river ‘bashes’ sand and stones against the banks
2. As river water is acidic, it can dissolve the banks away
3. The water itself forces cracks apart
4. As they get washed along by the river, stones knock into each other
5. The river scrapes stones along its bed
Now…
…how to remember the words and meanings
CorrasionCor! Aaah!
Fire hydrant
Corrosion
Chemical erosion
Rock most susceptible? Why?
Hydraulic action
(1)Spelling – hydraulic not hydrolic
(2)What does ‘hydr’ refer to?
(3)Air in cracks compressed
Attrition
Onomatopoeic?
Rock demo – angular or smooth
AbrasionA medical term….
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