What did Harry Hess and Robert Dietz suggest the cause of the continents moving was?
A) Convection currents
B) Radioactive decay
C) Conduction
D) None of these choices
A
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Modern tsunami warning systems primarily use ________.
A. webcams and airborne drones B. sea surface buoys and ocean bottom pressure sensors C. spotters in airplanes D. LIDAR and reports from Coast Guard ships E. satellite photography and radar
Imagine that you have a friend moving to a new area on the North American continent where there is a subduction zone offshore
What sorts of volcanoes would be most likely in this setting? Which volcanic hazards should you warn your friend to be alert for? What will be an ideal response?
The Russian Federation has a ________ urbanized population; and Central Asia is ________ urban
A) 50%; 50-70% B) 76%; 30-50% C) 72%; 56-69% D) 66%; 20-40% E) 80%; 25-45%
What is the reference that astronomers use to denote the luminosity of stars?
A) the luminosity of the Sun B) the luminosity of the Northern Star C) the luminosity of Proxima Centauri, our solar system's closest neighbor star D) the luminosity of the cluster of stars at the center of the Milky Way galaxy