Teacher resources and professional development across the curriculum
Teacher professional development and classroom resources across the curriculum
Learner Express: Modules for Teaching and Learning
Warm temperatures and wet weather contribute to rapid rates of soil formation. Geologist Andy Kurtz of Boston University compares two soil profiles, both developed over 400,000 years in the warm climate of Hawaii. By comparing the profile with heavy rainfall with one that is very dry, Kurtz demonstrates the effect of rainfall on the rate of chemical weathering of rock, and therefore, the rate of soil formation. Run Time: 00:02:33
Grades 5-8 Standard D. Earth and Space Science: Soil consists of weathered rocks and decomposed organic material from dead animals, plants, and bacteria that have different chemical compositions ad textures.