Q1. As the ocean crust sinks deeper into the mantle
a. it increases in temperature
b. it forms a lava fountain
c. it forms a volcano
d. its pressure decreases
Q2. Which of the following do scientists use to help predict volcanic explosions?
a. changes in a volcanos ultraviolet radiation
b. the ratio of volcanic gases escaping from a volcano
c. the angle of a volcanos slope
d. tiltmeters
e. changes in a volcanos surface temperature
f. satellite images
g. the frequency of earthquakes near a volcano
h. scanning tunneling microscopes
Q3. Small grained rocks have a ________ texture. In contrast, rocks made up of large grains have a ______ texture.
Q4. How does the cooling time of the magma affect the texture of the igneous rock that forms?
Q5. All cut through exsisting land except:
a. dikes b. sills c. batholiths d. plutons
Q6. Formations that are sandwiched between layers of exsisting rock formations are called _________ and _________-.
Q7. Extrusive igneous rock formations such as lava flows often __________ exsisting landforms.
Q8. How is natural cement formed?
Q9. __________ deposits of sediment caused by the wind
Q10. Garnet, is formed when hear and pressure cause the minerals _____________ , _____________, and ____________ to combine and recrystallize.
Q11. Suppose that a geologist finds the metamorphic mineral chlorite. At what depth did it form? 4-32 km, 6-34 km, 25-60 km, 30-70 km
Q12. Compasses always point to the northern magnetic pole. If the earths magnetic field is reversed, a compass would point to the ___________ pole?|||1. a - its getting closer to the core and getting slowly hotter
2. c - they bounce lasers off it to see if it's swelling from rising magma
3. smoothe, coarse
4. thermal shock can make it brittle. Hot steel shatters when you cool it raeally fast.
5. I'm unsure, try google
6. Unsure
7. consume
8. be more specific
9. cross-bedding sediment
10. either pyrope-almandine-spessarite or uvarovite-grossular-andradite
11. it can form as deep as 400km, it could have come from any depth
12. South pole. Thats called a geomagnetic reversal and is what the 2012 hype is about.
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