Where Does Soil Come From?

Trees come from seeds, and birds come from eggs, but where does all the soil and dirt come from? Second Grade Next Generation Science Standards Disciplinary Core Ideas: ESS1.C: The History of Planet Earth - Some events happen very quickly; others occur very slowly, over a time period much longer than one can observe (2-ESS1-1). ESS2.A: Earth Materials and Systems - Wind and water can change the shape of the land (2-ESS2-1). Performance Expectations: 2-ESS1-1. Use information from several sources to provide evidence that Earth events can occur quickly or slowly. 2-ESS2-1. Compare multiple solutions designed to slow or prevent wind or water from changing the shape of the land.