What is strike? What is dip? How are they measured in rock layers? What will be an ideal response?
Strike is the direction of a line formed by the intersection of a horizontal plane and an inclined plane.
Using a compass, a strike line's orientation is determined with respect to north. Dip is a measure of an
inclined plane's deviation from the horizontal. It is measured at right angles to the strike direction
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Explosive eruption is a violent eruption (i.e., explosion) mainly due to:
a. high temperature b. high pressure c. closest to Earth surface d. large volume
By current research, aboriginal people first came to the North American continent about when?
A) 1,400 to 5,000 years ago B) 14,000 to 50,000 years ago C) 140,000 to 500,000 years ago D) 1,400,000 to 5,000,000 years ago
Which of the following functions by activating an enzyme?
A) acetylcholine B) epinephrine C) estradiol D) insulin
The asthenosphere lies in the:
a. inner and outer core. b. mantle and crust. c. crust only. d. mantle only. e. outer core only.