This eliminates the need for separating materials and preparing soup mix each time. Be sure to check that the caps are tight on the bottles filled with liquids before returning them to the kit. When students are drying their solid materials, those using salt and candy should use less water or the evaporation process will take to long. Don't bother cleaning the bags from the mixing solids with water activity. They may be discarded and will be replaced by the science center.
Liquids Have students bring a liquid from home and then have a guessing game in class.
The rain guage doesn't go into our rocky soil very well. It may be easier to secure it to one of the schools drain pipes. Activity 2 - Air Explorations Make sure students understand safety rules before working with the syringes. Leave stoppers and pipes assembled for the next person's use. Make sure the pipes and flexible tubing are dry before storing in the plastic bags.