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Radioactive Dating: Looking at Half-Lives Using M&Ms
Kathleen Babich, South St. Paul Junior High School, South St. Paul, MN, based on an original activity retrieved from http://www.ucmp.berkeley.edu/fosrec/McKinney.html also with the help of Jenni Johansen (other 8th grade science teacher at So. St. Paul Junior High School
This is an activity that students will use M&Ms to gain a better understanding of radioactive dating and half-lives.
Mineral Density: Teaching accuracy, slope, and percent error in the Earth science classroom
Mary Colson Horizon Middle School Moorhead, MN
This activity is a lab investigation in which students make mass/volume measurements of several samples of the same mineral to determine the mineral's density. Students graph their data and make the connection between their qualitative understanding of what density is and the mathematical/graphical representation of density.
Sinking and Floating Water
This activity is a classroom lab where students learn that cold water is denser and hot water is less dense than room temperature water. Students perform an experiment and relate to their background knowledge to make conjectures.