There are dozens of cool science experiments that you can do at home. Many cool science experiments require a day long process and careful observation. If you like weather there are a number of cool science projects you can try at home. Finding out what is in the rain is one of those experiments. Experiment: Find Out What is in Rain Category: Meteorology/Environmental Materials: Microscope Container Funnel Tape Pie Dish Filter Paper To begin this science experiment you will need to place a clean and completely dry container outside on a day that it is raining. Put the container out in the open away from trees and buildings and leave it there for several hours. Bring the container in after it has collected an adequate amount of rain for examination. When you get the water inside you will need to filter the rain water. You can filter the rain water using a piece of filter paper in your funnel. Collect the water that runs through the filter and funnel in a separate clean dry c...