Intended for use prior to viewing the Science on a Sphere film "Water Falls," this lesson introduces students to Earth's water cycle and the importance of freshwater resources.

Students will work in teams to create visual models to assist in understanding the volume of surface ozone in the air. Students construct cubes of different volumes and compare them to get a feel for parts per million by volume and parts per billion... (View More) by volume. Resource includes a paper template for creating the cube and a student worksheet. This is a learning activity associated with the GLOBE Atmosphere investigations and is supported by the Atmosphere chapter of the GLOBE Teacher’s Guide. (View Less)