Why would astronomers have difficulty spotting a large incoming asteroid headed for Earth?
a. ?It remains in a fixed position in the sky as it comes in directly, so astronomers cannot see its trajectory.
b. ?It comes in so fast that they do not have time to see it.
c. ?It is dark before becoming heated in Earth’s atmosphere.
d. ?It is not an important topic to monitor for most astronomers.
e. ?It is simply too big to seem as if it is moving.
ANSWER: a
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The two most important languages in South America are
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Which spatial relationship would one use to find land parcels that are on an earthquake fault line?
A. proximity/adjacency B. containment C. intersect
The island of Madagascar is located just off the SE coast of Africa, in the Indian Ocean. Scientists find species on this island that have close biological relatives in both Australia and India. They also find that at each location there are fossils of similar organisms. What is the most likely explanation for this similarity between organisms in Madagascar, India, and Australia?
a. These organisms were moved back and forth to these different places by humans in recent geological history. b. They are on the same side of Wallace's line. c. he organisms were introduced to all three places by extraterrestrial beings. d. The ancestor of these organisms lived on a landmass long ago that included Madagascar, India, and Australia. e. These organisms independently arose by natural selection in each location.
Locate the high pressure cell centered over Idaho near Pocatello (shown in Figure 19-3 at about 45° N, 110° W). Based on the upper elevation wind patterns, in which direction would you expect this pressure cell to travel over the next few hours? Look carefully at the parallels and meridians, and be as specific as possible.
Figure 19-4: 500-Millibar Height Contours map for November 9, 2011.
What will be an ideal response?