The Blue Marble

 April 22nd is Earth Day. Use this activity to demonstrate the various mappings of our 3-d Earth to a 2-d piece of paper. Students compare maps with this famous photo and check to see which characteristics are maintained and which are distorted.] In honor of Earth Day we encourage you to show your classes the beauty of the Earth and remind everyone of one of the first times that it was seen in its entirety from space, December 7, 1972 from an Apollo mission.

This activity could be a starting or finishing place for a classroom attempt at drawing our continents and oceans on an orange and then trying to create a flat representation of that 3-d construction by peeling it. Let students figure out what problems occur in that translation.