Weathering The Earth’s surface is made up of mostly rock Although rock is hard, wind and water can slowly break it apart © LoveLearning 2014.

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Presentation transcript:

Weathering The Earth’s surface is made up of mostly rock Although rock is hard, wind and water can slowly break it apart © LoveLearning 2014

Weathering Weathering: the breakdown of rock at or near Earth’s surface © LoveLearning 2014

Weathering Wind and water can carry sand and other small pieces of rock Sandpaper makes wood smoother Blowing sand acts like sandpaper Ocean waves break down rock cliffs because the waves carry sand and pebbles http://www.glencoe.com/sites/common_assets/science/virtual_labs/E06/E06.html © LoveLearning 2014

Weathering Rain also causes weathering Water seeps into the cracks of a rock As the water freezes, the rock expands and cracks When water freezes into ice, the ice expands and cracks the rock into wedges As rocks freeze (contract) and heat up (expand), rocks break apart Click on the title for an interactive site! © LoveLearning 2014

Weathering Wind, water, and plants weather rock The weathering breaks rock into smaller and smaller pieces over a long time These pieces become pebbles and sand Small pieces of rock along with material from living things make up soil © LoveLearning 2014

Erosion After weathering breaks down rock into sediment (small pieces), erosion carries it away Erosion: the movement of weathered rock from place to place © LoveLearning 2014

Erosion by Water Rivers remove rock and soil and carry it away This leaves channels and valleys in the soil Over a long period of time, the Grand Canyon was formed because of the Colorado River! © LoveLearning 2014

© LoveLearning 2014

Erosion by Glaciers Glacier: a large, slow-moving piece of ice Glaciers erode rocks as they move across the Earth © LoveLearning 2014

Erosion by Glaciers Glaciers that pass through valleys widen and deepen the valley Also scoop out holes in the ground (can later fill up with water) © LoveLearning 2014

© LoveLearning 2014

Erosion by Ocean Waves As ocean waves hit the shore, they can deposit sand and form beaches They can also remove sand from the beaches © LoveLearning 2014

Erosion by Ocean Waves Waves also pound against landforms and break down rock cliffs These cliffs can form new landforms © LoveLearning 2014

Erosion – Extra Links http://sciencenetlinks.com/media/filer/2011/10/07/forces.swf http://www.classzone.com/books/earth_science/terc/content/visualizations/es1205/es1205page01.cfm?chapter_no=visualization http://www.brainpop.com/science/earthsystem/erosion/ http://studyjams.scholastic.com/studyjams/jams/science/rocks-minerals-landforms/landforms.htm © LoveLearning 2014

Erosion – Bill Nye the Science Guy Video © LoveLearning 2014

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