Which of the following is true of red blood cells?
A) They circulate in the blood for about 1 month.
B) They are called leukocytes.
C) They have DNA.
D) None of these is true.
D
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The atomic weight of platinum is less than that of gold. If you have a 10 g sample of each of these metals, which of the following is true?
A) You have fewer of atoms of platinum than of gold. B) You have equal numbers of atoms of platinum and gold. C) You have more atoms of platinum than of gold. D) There is insufficient information to determine which of the above is true.
Chinook winds frequently bring warm temperatures to the Great Plains, even in the middle of winter. Why are these winds so warm?
A) Volcanic activity in the Rockies warms the air before it reaches the plains. B) Air as it descends tends to expand causing a warming effect. C) Warm air from the Gulf of Mexico meets the cold, dry air from the Arctic. D) Increasing pressure warms the air as it descends down the slopes of the Rocky Mountains.
Tsunami that reach the shallow water slow down due to ________.
A. friction with the bottom and internal turbulence B. changes in the density of seawater C. interference from seismic waves D. an increase in wavelength E. wind-blown waves crashing at the shoreline
The U.S. is unique in that all eleven climate types occur within its boundaries
a. True b. False Indicate whether the statement is true or false