Weathering and Erosion
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http://studyjams.scholastic.com/studyjams/jams/science/rocks-minerals-landforms/weathering-and-erosion.htm
http://scientiflix.com/post/119287095876/weathering-and-erosion-crash-course-kids-102
http://www.onegeology.org/extra/kids/earthprocesses/weathering.html
https://www.youtube.com/watch?v=J-ULcVdeqgE
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http://studyjams.scholastic.com/studyjams/jams/science/rocks-minerals-landforms/weathering-and-erosion.htm
http://scientiflix.com/post/119287095876/weathering-and-erosion-crash-course-kids-102
http://www.onegeology.org/extra/kids/earthprocesses/weathering.html
https://www.youtube.com/watch?v=J-ULcVdeqgE