C7+Salinity+of+ocean+-+earth+dating

Exercises borrowed from internet:



Students will do sample calculation with data to see how the process might work for determining the age of the earth. They can then go back and plot the age determination via this method on the graph (that Scott mentione d).

Students will need introduction activity to grasp why salinity of oceans changes over time, they won't come having enough context to make sense of that. We were thinking maybe a stream table with fresh water added over time and an evaporating lamp over an "ocean," measure the different salinity over a week or so. Then do the calculation once they have the science foundation of how it works.

Allison's exercise (C7A2, pt 2)