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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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
Only ________ percent of the region's energy comes from hydroelectric power
A) 1.1 B) 2.4 C) 6.9 D) 12.1
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
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