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. India B. China C. Japan D. Sri Lanka
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
The pycnocline is a rapid change in ________ with depth in the ocean
Fill in the blank(s) with correct word
Why is the Moment magnitude scale favored over the Richter magnitude scale?
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