From this cross section of the Grand Canyon, what occurred between the formation of the Precambrian metamorphic rocks and the deposition of the lowest Paleozoic rocks?
A. uplift
B. uplift and erosion only
C. erosion
D. deposition and tilting of the Precambrian sedimentary and igneous rocks
E. All of these choices are correct.
Answer: E
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A student has equal-volume samples of three gases. All the gases are at the same temperature and pressure. If the three gases are O2, CO2, NH3, which sample contains the largest number of molecules?
A) O2 B) CO2 C) NH3 D) None, they all contain the same number of molecules.
The different tiers of food production and consumption in an ecosystem within a feeding hierarchy are called
____________________ ____________________. Fill in the blank(s) with the appropriate word(s).
The pH scale is the logarithmic measure of hydrogen ion concentrations. Indicate whether the statement is true or false
Assume the time on your watch, showing local standard time, is 4:15 p.m. A chronometer reads 2:15 a.m. What is your longitude?
What will be an ideal response?