pg. 120 1/ 14/ 2013 focus: weathering, erosion, deposition objective: 6.e.2.3 today i will evaluate...

pg. 120 1/ 14/ 2013

Focus: Weathering, Erosion, Deposition

Objective: 6.E.2.3 Today I will evaluate the forces that shape the lithosphere.

HW: review and practiceWarm UP: Intro and Review(read both passages and answer

the questions – complete sentences)

Warm-up: Graffiti BrainstormWarm-up: Graffiti Brainstorm

Weathering, Erosion, Weathering, Erosion, Deposition, Rocks, Rock Deposition, Rocks, Rock Cycle, Minerals, Physical, Cycle, Minerals, Physical, ChemicalChemical

Homework: Homework: Draw a mountain. Draw a mountain. Then draw the same mountain 1 Then draw the same mountain 1 million years later. Describe what million years later. Describe what happens to the mountain over happens to the mountain over time. (The words: weathering, time. (The words: weathering, sediment, erosion, and sediment, erosion, and deposition must be included.)deposition must be included.)

Weathering and ErosionWeathering and Erosion

WeatheringWeathering Weathering is: Weathering is: Process where Process where

natural forces break down rocksnatural forces break down rocks

Physical Weathering: Rocks breaking Physical Weathering: Rocks breaking down with out changingdown with out changing

Chemical Weathering: Rocks Chemical Weathering: Rocks breaking down changing the breaking down changing the composition and pulling minerals out composition and pulling minerals out the rocksthe rocks

Type of Weathering: Frost WedgingType of Weathering: Frost Wedging

Rocks split apart when water freezes and expands.

Frost WedgingFrost Wedging

slowly broke slowly broke up this up this sedimentary sedimentary rock into rock into unusual unusual shapes.shapes.

The earth's surface is constantly being The earth's surface is constantly being eroded. This means that rocks are broken eroded. This means that rocks are broken up into smaller pieces by weathering up into smaller pieces by weathering agents such as wind, water, and ice. These agents such as wind, water, and ice. These small pieces of rock turn into pebbles, small pieces of rock turn into pebbles, gravel, sand, and clay. They tumble down gravel, sand, and clay. They tumble down rivers and streams. These pieces settle in rivers and streams. These pieces settle in a new place and begin to pile up and the a new place and begin to pile up and the sediments form flat layers. Over a long sediments form flat layers. Over a long period of time, the pieces become pressed period of time, the pieces become pressed together and form solid rock called together and form solid rock called sedimentary rock. Most sedimentary rocks sedimentary rock. Most sedimentary rocks form under water. Most of the earth has form under water. Most of the earth has been covered by water some time in the been covered by water some time in the past. 70% of the earth is covered by water past. 70% of the earth is covered by water now. So sedimentary rocks are common all now. So sedimentary rocks are common all over the world. Sedimentary rocks are over the world. Sedimentary rocks are often rich in fossils. often rich in fossils.

Plant RootsPlant RootsTrees, bushes, and other plants may grow in cracks in rocks as the roots grows -> split rock

WaterWater Water Water

weathers rock weathers rock by rubbing it by rubbing it over and over over and over again.again.

Acid RainAcid Rain

Rain or snow has been polluted.

Acid RainAcid Rain

ErosionErosion The process where water, ice, The process where water, ice,

wind or gravity moves bits of wind or gravity moves bits of rock and soil.rock and soil.

What is the Difference BetweenWhat is the Difference BetweenWeathering and Erosion??Weathering and Erosion??

Weathering: If a particle is Weathering: If a particle is loosened but stays in one place.loosened but stays in one place.

Erosion: Once the particle starts Erosion: Once the particle starts moving.moving.

DepositionDeposition

Deposition: Deposition: sediment is placed in sediment is placed in a new locationa new location

GravityGravity: important part of : important part of erosion and depositionerosion and deposition

Which mountain experienced the Which mountain experienced the most erosion? most erosion?

Height in the year 1508 A.D.

Height in the year 2008 A.D.

Mountain A 1500 Meters 1450 Meters

Mountain B 1500 Meters 1250 Meters

Mountain C 1500 Meters 1320 Meters

Mountain D 1500 Meters 1400 Meters

Which mountain experienced the Which mountain experienced the most deposition? most deposition?

Height in the year 1508 A.D.

Height in the year 2008 A.D.

Mountain A 1500 Meters 1450 Meters

Mountain B 1500 Meters 1250 Meters

Mountain C 1500 Meters 1320 Meters

Mountain D 1500 Meters 1400 Meters

Weathering Weathering Erosion Erosion Deposition Deposition

Water ErosionWater Erosion

Rivers, streams, and runoffRivers, streams, and runoff

WaterWater

In this picture In this picture the running the running

water water eroded the eroded the sides of this sides of this canyon and canyon and created the created the V-shaped V-shaped valleys.valleys.

Ice ErosionIce Erosion

Glaciers – large Glaciers – large mass of ice that mass of ice that moves over landmoves over land

Glaciers carve land, move sediments, break up rock

This is a picture of a glacier which carves out a U-shaped valley

where it flows dragging rocks and boulders along the way.

Wind ErosionWind Erosion

WindWind These rocks These rocks

have been have been blasted by blasted by wind and wind and sand causing sand causing them to them to become become rounded.rounded.

Mass MovementsMass Movements

Landslides, mudslidesLandslides, mudslides

CreepCreep

This is a diagram of creep. The hillside slowly slips over

many years from temperature or water.

Ocean waves, currents – Ocean waves, currents – powered by wind -> move powered by wind -> move thousands of tons of sand thousands of tons of sand on beaches can change on beaches can change the look of the land and the look of the land and shape a variety of coastal shape a variety of coastal landformslandforms

Barrier islands – long, Barrier islands – long, narrow islands that narrow islands that develop parallel to the develop parallel to the coastcoast

Port Campbell National ParkPort Campbell National Park Movement of Movement of

water, constant water, constant action of waves action of waves breaking against breaking against the cliffsthe cliffs

Caused slow wearing of the cliffs

http://http://www.nationalgeographic.com/www.nationalgeographic.com/ngkids/games/brainteaser/ngkids/games/brainteaser/grandcanyon/grandcanyon.htmlgrandcanyon/grandcanyon.html

http://http://www.nationalgeographic.com/www.nationalgeographic.com/xpeditions/lessons/07/g35/xpeditions/lessons/07/g35/canyon35.htmlcanyon35.html

Sediment can be transported by wind Sediment can be transported by wind and water.and water.

Copyright © 2010 Ryan P. Murphy

Picture of sediment deposition of the Picture of sediment deposition of the Amazon Delta from space.Amazon Delta from space.

Copyright © 2010 Ryan P. Murphy

Picture of sediment deposition of the Picture of sediment deposition of the Amazon Delta from space.Amazon Delta from space.

Copyright © 2010 Ryan P. Murphy

Activity! Not Smart Board.Activity! Not Smart Board.– Arrange the terms into the correct order Arrange the terms into the correct order

by moving them around.by moving them around.

START

END

Activity! Not Smart Board.Activity! Not Smart Board.– Arrange the terms into the correct order Arrange the terms into the correct order

by moving them around.by moving them around.

START

END

Activity! Not Smart Board.Activity! Not Smart Board.– Arrange the terms into the correct order Arrange the terms into the correct order

by moving them around.by moving them around.

START

END

Activity! Not Smart Board.Activity! Not Smart Board. Answer:Answer:

START

END

Sedimentary RocksSedimentary Rocks– -Sediments are compacted and -Sediments are compacted and

cemented together.cemented together.– Caused by weathering, erosion, and Caused by weathering, erosion, and

depositiondeposition..– --– --

Copyright © 2010 Ryan P. Murphy

Usually layered.Usually layered.

Copyright © 2010 Ryan P. Murphy

Usually horizontal

But not always

?

Compression Fold

Syncline