Why is the Mid-Atlantic Ridge important to geologists?
A) It is a divergent boundary, causing the Atlantic Ocean to widen by about 5 centimeters each year.
B) Massive earthquakes take place there every day.
C) It is the source of tsunamis.
D) Plate subduction occurs, shrinking the Atlantic ocean about 5 centimeters each year.
Answer: A
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Seafloor spreading
A) ended with the breakup of Pangaea. B) is the result of subduction. C) can occur at divergent plate boundaries. D) was documented by Alfred Wegener.
You are given two igneous rock samples; one is said to be an intrusive (plutonic) rock and the other an extrusive (volcanic) rock. How can you tell which is which?
What will be an ideal response?
Sometimes tiny pyroclastic particles are ejected into the atmosphere and settle to the surface as a(n) ____________________. In contrast, a(n) ____________________ is a cloud of these tiny particles and gas that moves along or close to the land surface
Fill in the blank(s) with correct word
Heat transfer from the equatorial regions to the poles ceased during the ____
A)Paleogene B)Paleocene-Eocene Thermal Maximum C)Paleogene Thermal Maximum D)Holocene glaciation E)Pleistocene glaciation