Important and Top Missed Q's: Exam 1

1. What controls the properties of a mineral/how are minerals classified?

   • anion

2. What area would you go to find an example of area D (oceanic crust subducting under continental crust)

   • andes mts

3. Volcanoes are expected at what plate boundary?

   • ocean-ocean collision (think about islands and hawaii)

     • would be ocean-something

4. What type of plate boundary is associated with the subduction of one plate beneath another?

   • convergent (oceanic subduction slab could go all the way down to the mantle - 350 miles down)

5. At subduction zones, earthquakes are ____.

   • large range in depths and magnitude

6. The heat flow of Earth is explained by ____.

   • conduction and convection (have to have both, core to mantle to crust)

7. A positively charged ion is called a(n) _____.

   • cation

8. What happened to the early atmosphere of the rocky planets?

   • was burnt off by solar winds, comets hitting

9. What plate boundary forms the eastern edge of the North American plate?

   • Mid-Atlantic Ridge (East)

   • San Andreas Fault (West)

10. The largest volume of magmatism occurs at which plate boundary?

    • divergent (has eruptions that are underwater so we can’t see it)

    • convergent (mountains we see on land)

Quiz 3 Study Questions

• rounding is more likely to be greater if sediments are FAR FROM the source for siliciclastic sediments

• how well rounded a sediment is will depend on the sediment’s hardness, composition, and cleavage

• in order to turn sediments into a sedimentary rock, you must compact and cement.

• chemical weathering provides the dissolved ions for chemical and biochemical sediments to form.

• a faster current will transport larger sediments.

• graphite can turn into diamond due to pressure from metamorphism.

• metamorphic facies are groups of rocks based on pressure and temperature.

• metamorphic rocks are very useful for reconstructing ancient plate boundaries

• metamorphic reactions occur in the solid state.

• index minerals are helpful at identifying major changes in pressure and temperature