When were Africa and South America joined together?
What will be an ideal response?
Answer: Africa and South America were joined by 300 MA, and by 90 MA they were separated.
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Only ________ percent of the region's energy comes from hydroelectric power
A) 1.1 B) 2.4 C) 6.9 D) 12.1
A(n) ________ is an ice-transported boulder that was not derived from the underlying bedrock.
A. clast B. erratic C. inselberg D. esker E. nunatak
If magma or lava cools quickly, the resulting igneous rock will have ________
A) very large crystals B) very small crystals C) more variations in mineral types D) more silicate minerals
Instructions: Choose one answer from each pair of selections. Because of the bending of sunlight by the atmosphere, the sun will appear to rise about two minutes EARLIER | LATER than it would if there were no atmosphere