Changes to the surface of the Earth….

Slow Vs. Fast Fast Changes Slow Changes Volcanic eruptions Earthquakes Mudslides Landslides Erosion Weathering Deposition

Changes….. Slow…. Fast….

Weathering… ---breaking down of rock into silt, sand or clay…..

Erosion ----transporting of the broken down rock caused by weathering

Wearing away by the wind, can form such formations as dunes…. Wind Erosion…. Wearing away by the wind, can form such formations as dunes….

ICE EROSION Two types of glaciers A. Valley- U-shaped valleys, and they are high in the mountains. B. Continental glaciers cover large areas of Earth

Water Water and Wind are both agents of erosion and weathering.

Which of the following is the breaking down of rock into silt, sand and clay? Erosion Weathering Deposition Landslide

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Which of the following is the transporting of silt, sand or clay into a new location? Erosion Weathering Deposition Delta

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Fast Changes!!!!

Hurricanes

Earthquakes….

Review (Slow v. Fast) Some changes are slow! Some changes are fast!

Which of the following would be considered a fast change to the Earth’s surface? A tsunami taking out a coastline A river eroding soil along the shoreline and forming a delta Wind carrying a sand in the dessert and making a dune. deposition

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Landforms Glaciers or large sheets of ice form GLACIAL MORAINES – Cape Cod and Long Island are both GLACIAL MORAINES. Glacial moraines are formed as large pieces of ice push along the earth’s surface leaving behind large pieces of sediment. The large pieces of sediment form a landform known as the glacial moraine.

Landforms continued… Dunes are formed from wind erosion. They are formed slowly over time.

Landforms cont… Deltas are formed when water (rivers, streams or lakes) pick up sediment and deposit them into a new location. Over time, it creates a land mass known as a delta.

Mountain Formation Let’s look at a video… http://www.brainpop.com/science/earthsystem/mountains/zoom.weml The earth is made up of plates. The The plates are in constant movement. Sometimes plates collide, energy is released and new landforms are produced. Sometimes plates pull apart and allow magma to come to the earth’s surface.

Which of the following is made from river deposited sediments? Dune Delta Glacial Moraine Igloo

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Which of the following is a landform that is made from wind erosion? Delta Dune Glacial Moraine Igloo

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Pangea Theory that our world consisted of one giant “SUPER CONTINENT.” Fossils provide evidence of what organisms lived before us… What type of rock would I find a fossil in and why? Igneous, metamorphic, or sedimentary?

What have we learned? What are some slow changes? What are some fast changes? What is landform is made from water erosion? What is a sand dune? What type of erosion forms a dune? What is weathering? ADVANCED….. How would freezing and thawing affect the surface of the earth?

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