As a descending plate reaches depths of about 100 km, magma is generated in the overlying asthenosphere.
Answer the following statement true (T) or false (F)
True
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The difference between "Rayleigh" scattering and "Mie" scattering is:
A) the wavelengths of the incoming radiation. B) the size of the scattering particulates. C) the length of time the Sun shines. D) the angle of the incoming radiation. E) only A and B
Roughly ___% of US citizens live in coastal counties and are thus vulnerable to rises in sea level
a. 10 b. 50 c. 83 d. 95
Sinkholes and karst topography are a clear indication that ________
A) the area has been subjected to past meteorite bombardments and groundwater is moving through the fractured rock B) the groundwater is moving through cracks in the rock C) the groundwater is moving through a limestone and forming caves that periodically collapse D) there is nothing unusual; these features occur everywhere there is fast motion of groundwater in the subsurface
Which atmospheric layer has a temperature profile that decreases away from the warmth of Earth’s surface?
A. exosphere B. thermosphere C. mesosphere D. stratosphere E. troposphere