Weathering and Erosion

sedement

small pecies of rock that break down into smaller peices overtime

weathering

processes that break rock into smaller peices over time

sedement

small pecies of rock that break down into smaller peices overtime

weathering

processes that break rock into smaller peices over time

chemical weathering

rocks that are broken into smaller peices through changes in their chemical composition.

A new substance has been created because of this process.

mechanical weathering

rocks are broken into smaller peices through physical changes. The composition of the rock never changes

oxidation

the process when oxygen in the environment reacts with such as copper or iron.

This is known as rust.

expanision/contraction

cold weather causes rocks to contract (get smaller), warm weather causes rocks to expand (get bigger).

abrasion

small rock particles are caused by wind and water as they strike rock surfaces the surfaces are worn won.

regolith

a region of loose unconsolidated rock and dust that sits atop a layer of bedrock

glaciers

large sheets of ice that moves across land surfaces. Ace the ice moves, large pieces of rock and sediment move as well.

• 0.006 mi squared in size

• 164 ft thick

deposition

sediment that are dropped in a location by erosion. Layers are built up over time.

dune

the sedement that is moved by wind can accuulate into large mounds called “dunes”

delta

as a river water enters a slower body of water.

moraine

as a glacier melts they leave behind a ridge of a different sized sedement called a “moraine”

base level

the limit below which a stream cannot erode

Indicators of a physical change in a rock.

Size and shape

Indiciators of a chemical change in a rock

changes in the color and formation of the rock

Weathering

processes that breaks down rocks and sedement from natural erosion

Erosion

the process of eroding or being eroded by wind, water, or other natural agents.

Deposition

sediments are deposited, or dropped off, in a different location.

What is the difference between erosion and depositoin

Erosion is when materials, like soil or rocks, are moved by wind or water. Deposition is when those sediments are deposited, or dropped off, in a different location.

Ice/Frost wedging

crcracks in rocks that form because of liquid (water) filling the cracks. When the climate turns cold, the water freezes then the cracks spread/expand

Abrasion

small particles of rock. Sedement pushed down by water

Root Wedging

plant roots that grow into the rocks, the roots push the rocks apart.

Expansion & Contraction

cold weaterhing that contracts rocks, rocks get smaller.

Animal Burrows

as animals dig their home into the ground, they cause rocks to break into smaller peices.

What is the term that is caused by animails making burrows in the ground?

animial burrows

How does rust form?

Oxygen & moisture that sits on a certian meterial/object for a certian perod of time, ending up causing rust to form.

What is rust actually called?

Iron Dioxide

How does plants cause chemical AND mechanical weathering?

Roots grow into the rocks and cause them to devlop cracks.

Wind abrasion

a natural process that occurs when wind-carried particles wear away solid objects

ice wedging

a process that breaks down rocks and other materials through freezing and thawing cycles

Explain how rivers can cause erosion.

The movement of water in streams and rivers pushes along the soil and breaks down pieces of rock in a process of erosion

EROSION OR DEPOSITION?

A ridge of sediment is left behind as a glacier melts.

Deposition

EROSION OR DEPOSITION?

Glaciers move across land, picking up and moving sediment in the process.

Erosion, glacial.

EROSION OR DEPOSITION?

Sediment from a river gets deposited to form a delta.

Deposition, sedement.

EROSION OR DEPOSITION?

Small rocks and sedement that is blown into the wind

erosion, by abrasion.

That qualifies as a glacier.

• Large

• Frozen body of ice (large mass)

• A mass so big that it can move downhill under it’s own weight.

-Classification-

• 0.06 miles, size

• 164ft, thick

the process by which rocks are broken down

weathering