________ indicates that the core of the Earth is a liquid.
A. Density calculations
B. The P-wave shadow zone
C. Studies of meteorites
D. The S-wave shadow zone
E. The Earth's heat flow
Answer: D
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If wavelength is 18 meters, wave base is located at ____
A)2 meters B)6 meters C)9 meters D)12 meters E)18 meters
In regions where there are no clouds, it is difficult to observe the movement of air using satellite imaging. To help with this situation, geostationary satellites are equipped with ____ that can profile the distribution of atmospheric water vapor in the middle and upper troposphere
a. special radiometers b. water-vapor sensors c. ultraviolet imaging sensors d. computer enhancement software e. reflected light imaging capabilities
Which clouds are puffy and cauliflower-shaped?
A. cirrus B. nimbus C. stratus D. cumulus
In the United States today, the most widely used system to generate electricity uses
A) oil to power turbogenerators. B) natural gas to power turbogenerators. C) coal to power turbogenerators. D) water to power hydroturbogenerators.