When Pangaea was assembled, the ocean surrounding it was the _______. Fill in the blank(s) with the appropriate word(s)
Panthalassa Ocean
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Instructions: Choose one answer from each pair of selections. Dew is more likely to form on nights that are CLEAR AND CALM | CLOUDY AND WINDY
A sandstone is found to overlie a shale. The shale contains a volcanic ash layer that has been radiometrically dated to 84 million years ago. Both the shale and the sandstone are cut by a pluton of gabbro that has been dated to 60 million years old
How old is the sandstone layer? A) between 84 and 60 million years old B) older than 84 millions years old C) younger than 60 million years old D) more information is needed to constrain the age
What is one reason that modern cities are warmer than rural areas?
A) Concrete retains heat better than vegetation. B) Cities contain more species of plants and animals. C) Cities are closer to water. D) There is more evaporation from city streets than from rock and soil.
The rising global demand for food has recently been met by ________
A) an increase in per-acre crop yields B) switching to a diet high in fish and seafood, which do not require cropland C) cultivating more land D) decreasing the per-capita amount of food available