ENVIRSC 1G03 Midterm: Midterm1 Review.docx

• School: McMaster University
• Department: Environmental Science
• Course: ENVIRSC 1G03
• Professor: Maureen Padden

Document Summary

* all the rocks are the same age. Sea ice isn"t glaciers: water transmits heat very good, better than air, on antarctica in pangea it is unlikely that glaciers moved from the ocean on to land, paleomagnetic evidence the movement of the mantle determines the poles. We had no map until ww2 there is the biggest mountain chain the world in the mid-atlantic. Middle of the chain there is a valley, and it is getting wider the crust cracks, magma comes up and cools, and becomes new rock there is earthquakes happening there all the time. Na is pulling apart from europe, and iceland is right in the middle oceanic crust is created at mid ocean ridges. Plate tectonics ocean crust is dense, land crust is not dense: boundaries, divergent two plates moving away from each other crust is created, convergent two plates are colliding with each other crust is recycled.