Density, Gravity and Motionless Balanced Floating
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Activity 5 – Isostasy and Earth’s Global Topography
How can we relate the density of rocks to the topography of the Earth?
INITIAL IDEAS
Once again, look at the 3-D map with the 3-D glasses. Write down some largescale observations you make from looking at this map that include information
about patterns in elevation of Earth’s surface (i.e., oceans vs. continents). Make
sure you are recording observations rather than inferences.
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In your group share and discuss these observations. Choose one or
two to share with the whole class.