GEOG120 Chapter Notes - Chapter 2: Plate Tectonics, Divergent Boundary, Volcanic Ash
28 Sep 2017
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Chapter 2 physical geography and the environment. Plate tectonics the lithosphere consists of large geologic platforms, or plates, that move very slowly across its surface. Convergent plate boundaries where plates move toward one another. Divergent plate boundaries where plates move apart. Transform plate boundaries 2 plates grinding laterally past one another. Subduction zone one plate often sinks below another. Rift valley deep depressions formed at some divergent boundaries. Pangea a supercontinent centered on present-day afri(cid:272)a (cid:449)here all the (cid:449)orld"s la(cid:374)d (cid:373)asses were tightly consolidated 250 million years ago. Volcanoes provide some benefits to people: geothermal activity produces energy to heat houses and power factories, volcanic ash has enriched soil fertility for agriculture. Insolation incoming short-wave solar energy; passes through the atmosphere and is a(cid:271)sor(cid:271)ed (cid:271)y earth"s la(cid:374)d a(cid:374)d (cid:449)ater surfa(cid:272)es. Reradiate heat back into the lower atmosphere as infrared, long-wave energy. Greenhouse effect natural process of atmospheric heating. Maximum solar radiation at a given location occurs seasonally.
