The volcanic landform exhibiting a large circular depression with steep walls and a fairly flat floor, and formed after an eruption as the center of the volcano collapses into the drained magma chamber below is called:
a. Columnar joints
b. Caldera
c. Pillow lava
d. Lava tubes
Answer: b. Caldera
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A) The Richter magnitude is based on older models of seismographs that are no longer used to record earthquakes. B) The Richter magnitude always underestimates the amount of energy released by an earthquake. C) The Moment magnitude measures the total energy released by an earthquake. D) The moment magnitude carries the calculated values out to more decimal places so it is more precise.
Which of the following statements describes an acidic solution?
A) [H3O+] > [OH-] B) [H3O+] < [OH-] C) [H3O+] × [OH-] ? 1 × 10-14 D) [H3O+]/[OH-] = 1 × 10-14 E) [H3O+]/[OH-] = 1
Monks from ___________ brought Buddhism to Burma (Myanmar).
A. India B. China C. Japan D. Sri Lanka
The pycnocline is a rapid change in ________ with depth in the ocean
Fill in the blank(s) with correct word