a student models moon phase she holds a foam ball on a stick in front of her body and stands in front of the light as shown. the student uses herself to represents earth. she turns her body slowly to phases.

D- Diagram 4

the full moon is represented in diagram four.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).