Petrified wood develops when buried wood is saturated or replaced with calcite.
Answer the following statement true (T) or false (F)
False
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Using Figure 12.11 in your textbook, which option correctly identifies a time that polarity changed from normal to reverse and back?
A) normal to reverse: 3.04 million years ago, reverse to normal: 2.60 million years ago B) normal to reverse: 2.60 million years ago, reverse to normal: 1.79 million years ago C) normal to reverse: 3.33 million years ago, reverse to normal: 3.04 million years ago D) normal to reverse: 1.79 million years ago, reverse to normal: 0.99 million years ago
Which of the following is true of the subsolar point?
A) It is primarily a Northern Hemisphere phenomenon.
B) The highest latitude at which it occurs is 60° N/S.
C) It never occurs beyond a few degrees of the equator.
D) It occurs at all latitudes at least once throughout the year.
E) It only occurs at lower latitudes, between the tropics (23.5° N/S).
The city of New Orleans is in the delta of a great river. During hurricane Katrina most of the city flooded but the area along the river, like the French Quarter, did not. Why didn't these areas flood?
A) The water couldn't flow fast enough to cover these areas and was halted before it could flood these areas. B) The river flowed away from these areas into other parts of the city when it broke the levees, and these areas just happened to be spared. C) The army corps of engineers must have dredged the river and built these areas up before the city was built. D) These areas were natural levees of the river, and were higher in elevation than adjacent areas.
Which of the following cities is/are among the world's most livable?
A) Adelaide B) Auckland C) Port Moresby D) Adelaide and Auckland E) Adelaide, Auckland, and Port Moresby