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Erosion (page 2)

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Author: Janice VanCleave

For Further Investigation

Earth's surface is made of different substances. Will rocky mud balls erode? A project question might be, How does the composition of a material affect its erosion?

Clues for Your Investigation

  1. Repeat the original experiment with different mixtures of soil and aquarium rock. For example, mixtures might be one-fourth soil and three-fourths rock, half soil and half rock, or three-fourths soil and one-fourth rock.
  2. For the most accurate results, mix enough mud so that each test can be repeated four or more times to compare the erosion of the different mud balls. Then average the results. Measure the soil collected in the cup to compare the rates of erosion of the different mud balls.

Washout

References and Project Books

Campbell, Ann-Jeanette, and Ronald Rood. The New York Public Library Incredible Earth. New York: Wiley, 1996.

Churchill, E. Richard. 365 Simple Science Experiments with Everyday Materials. New York: Black Dog & Leventhal,1997.

Farndon, John. How the Earth Works. Pleasantville, N.Y: Reader's Digest, 1992.

James, Ian. Planet Earth. Bath, England: Dempsey Parr, 1998.

Times-Life Books. Planet Earth. Alexandria, Va: Time-Life Books, 1997.

VanCleave, Janice.]anice VanCleave's A+ Projects in Earth Science. New York: Wiley, 1999.

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