The lithosphere rides on top of the asthenosphere. Lithospheric movement causes
A) earthquakes, volcanic activity, and mountain building activity.
B) the subduction of continental crust under oceanic crust.
C) hot-spot activity as found in Hawaii.
D) widespread destruction.
Answer: A
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A convex mirror always produces a virtual image smaller than the object
Indicate whether the statement is true or false
"Time-of-day" pricing of electricity could help to
A) reduce the need for new power plants by encouraging users to use less electric energy. B) reduce the need for new power plants by encouraging users to use electric energy at less popular times. C) reduce the nation's appetite for chocolate fudge. D) reduce total electric energy use by encouraging users to use electric energy at less popular times. E) reduce total electric energy use by encouraging users to use less electric energy.
A baseball is located at the surface of the earth. Which statements about it are correct? (There may be more than one correct choice.)
A) The earth exerts a much greater gravitational force on the ball than the ball exerts on the earth. B) The ball exerts a greater gravitational force on the earth than the earth exerts on the ball. C) The gravitational force on the ball due to the earth is exactly the same as the gravitational force on the earth due to the ball. D) The gravitational force on the ball is independent of the mass of the ball. E) The gravitational force on the ball is independent of the mass of the earth.
Which is NOT a critical factor that determines the habitability of a rocky planet?
A) size B) distance from parent star C) presence of a magnetic field D) presence of an atmosphere