A soil profile is a vertical section of soil arrangements under the surface of the earth. The soil is arranged in layers, which are called soil horizons.
Next, explore what you've learned with hands on projects you select from among the many choices in each unit. The whole family can dig into the learning together. Step 3 Show What You Know Finish up by completing a writing assignment, game, quiz, or activity. Each unit gives lots of id...
Mock Bowl Quiz2 | PageIf you didn't use the layering demonstration in the salinity lesson, you may want to create the following solution to remind students how layers form in the ocean: 1. Before class, fill a clear water bottle or beaker halfway with cool tap water. Add salt until ...