GEOL 1001 : Geology Test 1 Notes
Document Summary
Geological processes, phenomena, and materials play a role in your everyday life. In three minutes: the temperature has cooled to less that 1 billion degrees, hydrogen fused to form helium (he, all atomic nuclei formed, cooling causes patchy clouds, nebulae, made of h & he. Matter: anything you can feel, has mass, and takes up space. Part two: layers of the earth: chemical layers. As earth pulled in debris, matter was squeezed into a smaller volume. ** high density material sinks to the middle as earth is heated. -91. 2% of earth is made of iron, oxygen, silicon, and magnesium. -rocks are mostly silicates, meaning they have something plus sio subscore 2 aka quartz. -crust made of silicates; low density, avg. distance of 25-35 km: continental crust- any crust beneath our feet, mostly granite (low density, oceanic crust- any crust underneath the ocean, 0- 7 km thick (high density) referred to as basalt (fe+mg+sio2)
