When ice dams in front of the largest glacial lakes failed, stupendous floods resulted whose passage is still recorded ________.
A. by abandoned waterfalls
B. by a system of braided channels, now left mostly dry
C. by countryside stripped of all soil and sediment cover
D. in lake sediments
E. All of these choices are correct.
Answer: E
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Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties?
A. Yes, but that their properties are similar is only a coincidence. B. No, but their similar properties are only a coincidence. C. Yes, and this explains how fish are able to breathe water. D. No, compounds are uniquely different from the elements from which they're made.
A liter of helium gas of 0°C when twice as hot has a temperature of
A. 273°C. B. 100°C. C. 2°C. D. 0°C.
There are _________ major climate categories within the simplified version of Köppen's climate classification system
a. two b. four c. six d. eight
Which of the following is true of infant mortality rates (IMRs) around the world?
A) In general, IMRs are highest in countries with poor health care systems B) In general IMR are highest in countries with better health care systems C) The quality and availability of doctors has no bearing on a country's IMR D) There is no discernible difference in IMRs between the entire population and minorities in the US E) IMRs have not been measured in any country outside North America with any accuracy