Which action would geologists take in order to determine the Richter magnitude of an earthquake?
A) analyze seismic instrument readouts
B) take core samples at several spots and from different distances from the epicenter
C) assess financial costs of rebuilding roads, buildings, and public areas in the quake zone
D) interview people who experienced the quake
Answer: A
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Which of the following pairs best represent nation-states?
A) the Basque Region and Kurdistan B) Japan and Iceland C) United States and Canada D) India and Russia
Why is the carbon-14 dating not accurate for estimating the age of materials more than 50,000 years old?
A. The concentration of carbon-14 in a body after 50,000 years is too low. B. Living organisms are too decomposed after 50,000 years. C. This form of radioactive dating is only accurate back 1,400 years. D. Actually, carbon-14 dating is accurate back to around 5 million years ago.
The amount of water associated with the wilting point in clay is ________ than that for sand and silt
A) greater B) less C) approximately the same
The normal percent of water vapor in dry air is ________ percent
A) 0-4 B) 5-10 C) 15-20 D) 25-30 E) 45-50