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Huff, puff and blow as hard as you can—do you think you can blow down a sand castle with your mighty breath? Blowing air erodes—wears away—sand and dirt. In Three Little Pigs, houses of straw or twigs were no match for the Big Bad Wolf's strong lungs. Do you think a house made of sand or mud could hold up to wind or water? Let's find out in this erosion experiment.
In some parts of the world, houses are still made from mud and sand, which makes them easier to knock down than homes made of brick and stone. To understand how these materials can (and should) be used to make homes, you'll need to explore how they stand up to the elements.
Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.