Change and Cycles - Where Land, Air, and Water Meet To develop an understanding of parts per million as a concept, teams of students will create successive dilutions of a solution to reach a parts-per-million concentration. http: //interactive2.usgs.gov/learningweb/teachers/...
Natural Hazard Risks in the United States Students have probably studied natural hazards (e.g. earthquakes and hurricanes) in elementary school... http: //nationalgeographic.com/xpeditions/lesso...
Time and Cycles In this activity straws will be used to simulate tree-ring core samples. Using the straws, students will work in groups to reconstruct a 50 year climatic history. http: //interactive2.usgs.gov/learningweb/teachers/...
