The solar system is surrounded by the Oort cloud composed of about a trillion comets, icy objects with orbits that take them far beyond the outermost planets of our solar system.
Answer the following statement true (T) or false (F)
True
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Natural gas reserves in the United States ________
A) are larger than those of any other country B) have been almost fully depleted, so the United States must import most of its natural gas C) are expected to last at least another 70 years D) are being replenished more quickly than they are being used
Why is it difficult to know if we are out of the Pleistocene or merely in an interglacial period?
What will be an ideal response?
Which of the following does not describe an index fossil?
A. Good correlation tool B. Poor tool for determining relative age C. Geographically widespread species D. Short-lived species E. Existed during a specific time-period
The width or horizontal extent of a typical mid-latitude low pressure system would be:
A) 1000 km. B) 10,000 km. C) 50 - 100 km. D) 20,000 km. E) 5 - 10 km.