What were some of the earliest forms of life on Earth?
A. microscopic creatures that built mound-shaped structures called stromatolites
B. sharks
C. corals and other bottom-dwelling sea creatures
D. land plants and insects
Answer: A
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Which of the following accurately compares the temperatures of cities and rural areas on clear, cold, winter nights?
A. Cities tend to cool more slowly than rural areas and have higher temperatures. B. Cities tend to cool more quickly than rural areas and have lower temperatures. C. Cities tend to cool more slowly than rural areas and have lower temperatures. D. Cities tend to cool more quickly than rural areas and have higher temperatures.
Under which of the following conditions do hurricanes dissipate?
A. when they move over land B. when upper-level outflow of air exceeds surface inflow of air C. when they move over warm water D. when they move into a region of weak vertical wind shear
Where were marsupials most abundant during the Cenozoic Era? What has been their fate thus
far? What will be an ideal response?
In general, the restoring force for most wind-generated waves is ________
A) cohesion of water molecules B) gravity C) seismic activity D) surface tension of water molecules E) wind