In terms of hydraulic power and erosion, underground water can be said to be ________ compared to surface water
What will be an ideal response?
Answer: relatively weak (or words to that effect)
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Vertebrates first appeared in the ____
a. Cambrian b. Devonian c. Permian d. Mississippian e. Ordovician
Why are Mesozoic and Cenozoic paleogeographic reconstructions more accurate than reconstructions for earlier time
intervals? a. Mesozoic and Cenozoic rocks are better preserved on ocean floor b. Mesozoic and Cenozoic rocks have not been destroyed by subduction c. Mesozoic and Cenozoic rocks were deposited underwater. d. Mesozoic and Cenozoic rocks have not experienced erosion. e. Very few tectonic events have occurred since Mesozoic and Cenozoic time
Due to their speed, lava flows often threaten human lives.
Answer the following statement true (T) or false (F)
Savannas differ from grasslands by having
A. lower average annual temperature. B. a period of the year with heavy rain followed by a lack of rainfall. C. no grazers. D. less annual precipitation.