Breaking Down and Moving Rocks

science

breackin down and moving rocks

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lessons

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Meaning

Mechanical weathring

Two main process

Chemical weathring

Vedios

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Process

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how the rocks breack

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Introduction here

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breacking down rocks

• A rock is a naturally occurring solid material that is normally made of minerals.
• The outer layer of Earth, called the crust, is made up of rigid rock.
• Every day, rocks move and change shape as the wind blows and rain falls.
• ; These rocks breack in two main things ;

AND

Weathring Erosion

Weathring Erosion

• Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

• Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.

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Weathring Process

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Mechanical Chemical

When rocks disintegrate or break up without experiencing any change in their chemical composition, it is known as mechanical weathering. Thermal expansion and contraction that happens due to the increase or decrease in temperature. This process causes the rock to break into fragments. Let us see in detail about each type of weathering.

Chemical weathering is the process by which the minerals that rocks are made of are changed or decomposed by chemical agents. Chemical weathering does not break rocks physically, but alters their chemical and mineralogical composition. Chemical weathering happens gradually and ongoingly as the rock adjusts to the near-surface environment. Examples of chemical agents that cause chemical weathering are oxygen, acids, water, and carbon dioxide .

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DELTA And DEPOSITION

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Weathring process

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delta

deposition

The process of dropping, or depositing, sediment in a new location. Sediment is made of small pieces of rock, soil, or other materials that are broken down by weathering and moved by wind, water, ice, or gravity. Deposition can change the shape of the land or landforms over time.

The term delta is used for any plain made up of material deposited by a river at its mouth. Rivers often carry a lot of soil, sand, and other material. When the flow of a river slows at its mouth, some of that material settles. Over the years the material builds up to form a delta.

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AVCTIVITY TIME !

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ingredints

1. PUT THE WATER ON A BOTTLE
2. PUT THE BOTTLE ON THE FREZZER
3. WAIT FOR 5 HOURS
4. OPEN THE FREZZER AND EXPLORE WHAT WELL HAPPEN

PHOTOS

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