Virtual Science Experiment Surface Mulch (PowerPoint & Slides) 3-5 Earth DayCelebrate Earth Day by exploring an easy and accessible way to help flower beds retain moisture during a drought. This engaging virtual activity allows you to perform a science experiment with all the learning without the mess or stress! This activity can be completed whole group, in small groups, independently, or for homework virtually if you upload it to your online platform. Your plan for this activity will depend on