EARTH SCI (lesson 1-weathering lesson 2&3- erosion and transport)

26問 • 2年前

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4 different landforms

mountains plateaus plains valleys

is the process of breakdown of rocks at the Earth's surface, by the action of water, ice, acids, salts, plants, animals, gravity and changing temperatures.

weathering

5 agents of weathering WAPTS

water salt temperature plants animals

3 types of weathering

physical chemical biological

• _ is caused by the effects of changing temperatures on rocks, causing the rock to break apart.

physical weathering

kapurpurawan rock formation at burgos ilocos norte

physical weathering

swiftly moving water weathering is an exmaple of

physical weathering

It occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.

freeze thaw

It can happen as cracks develop parallel to the land surface as a consequence of the reduction in pressure during uplift and erosion.

exfoliation

2 types of physical weathering

freezethaw exfoliation

_ is caused by rainwater reacting with the mineral grains in rocks to form new minerals (clays) and soluble salts.

chemical weathering

4 tyoes of chemical weathering

carbonation hydrolysis hydration oxidation

carbon dioxide in the air dissolves in rainwater and becomes weakly acidic. This weak "carbonic acid" can dissolve limestone as it seeps into cracks and cavities.

carbonation

the breakdown of rock by acidic water to produce clay and soluble salts. _ takes place when acid rain reacts with rock-forming minerals such as feldspar to produce clay and salts that

hydrolysis

a type of chemical weathering where water reacts chemically with the rocks, modifying its chemical structure.

hydration

the breakdown of rock by oxygen and water, often giving iron- rich rocks a rusty-colored weathered surface.

oxidation

of rocks occurs when rocks are weakened by different biological agents like plants and animals. • When plant roots grow through rocks, it creates fracture and cracks that result eventually to rock breakage.

biological weathering

2 classifications of biological weathering

by physical means by chemical compounds

Burrowing animals like shrews, moles and earthworms create holes on the ground by excavation and move the rock fragments to the surface.

biological weathering by physical means

Some plants and animals also produced acidic substances that react with the rock and cause its slow disintegration.

biological weathering by chemical compounds

is the process by which soil and rock particles are worn away and moved elsewhere by gravity, or by a moving transport agent - wind, water or ice.

erosion

involves processes by which sediments are moved along from the source to where they are deposited.

transport

commonly occurs in flat bare areas or dry, sandy and loose soils. • it detaches soil particles and transports them by the wind.

wind erosion

examples of what SANDSTORMS - Oklahoma - Kansas - Texas - New Mexico - Arizona - Middle east and North Africa

wind erosion

is a permanent body of ice, which consists of snow and show evidences of movement due to gravity. • As a rock moves over a rock, it acts like a bulldozer; the rocks and soil of the surface are scraped off and grinded against the mixture of ice and rocks. • This erosion process is dominant in polar regions and high altitude mountains.

glacial erosion

it is the most common erosion agent. • Millions of tons of sediments are picked up and transported everyday along rivers, coasts, and in deep oceans around the world.

water erosion

KPWKP (kakayahang pangkomunikatibo ng mga pilipino)

Samantha Danielle Sibayan · 29問 · 2年前

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