Harry Hess proposed the theory of seafloor spreading, the creation of new oceanic crust
at mid-ocean ridges. Indicate whether the statement is true or false.
T
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The amount of gravitational force that acts on a space vehicle in close-Earth orbit is
A. the same as the vehicle's weight on Earth's surface. B. nearly zero. C. nearly as great as the vehicle's weight on Earth's surface. D. none of the above
Earth's interacting subsystems or "spheres" are the
A. lithosphere, atmosphere, hydrosphere, biosphere, and ecosphere. B. lithosphere, hydrosphere, atmosphere, and biosphere. C. lithosphere, hydrosphere, and atmosphere. D. biosphere, lithosphere, and atmosphere.
Suppose the sky is completely covered with a thin, white layered-type cloud. You look at the
ground and see that objects cast a distinct shadow. From this you conclude that the cloud type must be: a. stratus. b. nimbostratus. c. cirrostratus. d. stratocumulus.
If an ecosystem exchanges both matter and energy with its surroundings, it would be referred to as a(n) ________ system.
A. Interactive B. Isolated C. Dynamic D. Closed E. Open