Teacher Note: Lesson 6D and Lesson 6E both have an option for planting a native species, such as plains coreopsis, or black oil sunflower seeds to show how roots help slow erosion. If you wish to demonstrate this, you will need to plant the seeds in 2 trays several weeks ahead of time. Plant the seeds in a small mound of soil in one end of each tray. One of these trays will be used for a water demonstration and the other for a wind demonstration. You could

Teacher Note: Because this lesson takes place in the winter, if a warm day does not happen, it is suggested to place items (except the match) in an oven for 8 minutes at 400 degrees Fahrenheit. An oven is recommended as students can record temperature. Although popcorn will pop in an oven at 400 degrees Fahrenheit, popcorn can

Teacher Note: Prepare cups with two small holes ahead of time. Holes can be made with a pin, and then widened with the tip of a pen.