Within Earth's mantle, convection cells move lithospheric plates toward ____ and away from ____
a. spreading centers; subduction zones
b. subduction zones; spreading centers
c. subduction zones; continental crust
d. spreading centers; hot spots
e. hot spots; spreading centers
b
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A blocky clastic sedimentary rock composed of mud would be called a
A) siltstone. B) mudstone. C) claystone. D) shale.
The degree of urbanization consists of
A) percentage of impervious cover and the percentage of area served by storm sewers B) the number of buildings taller than two stories C) the degree to which streams are impacted by paving of streets D) the proportion by which infiltration capacity of soils is changed
This photo shows an outcrop on Mars; the image was transmitted to Earth by a robotic rover traveling over the Martian surface
When geologists saw this image, some of them suggested that the rocks could be evidence of flowing water at some point in Martian history. What do you see to support that hypothesis? What process other than flowing water might produce the features visible in the photo? What additional information would you use to distinguish between these two hypotheses? What will be an ideal response?
At what point on the graph does the density of water begin to decrease? ________ The temperature at this point is ________.
A. D; 4°C B. A; -4°C C. C; 0°C (but higher density) D. B; 0°C