The earliest fossil evidence of life is in the form of ________
A) cyanobacteria
B) trilobites
C) Tully Monsters
D) brachiopods
Answer: A
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How do stalactites, stalagmites, columns, drip curtains, and travertine terraces form? What will be an ideal response?
Referring to Table 3.3: The air temperature is 45o F, the wind is blowing at 30 MPH, and the
wind chill temperature is 15o F. These conditions would be equivalent to:
a. a 15o F air temperature and 0 MPH winds.
b. a 30o F air temperature and 45 MPH winds.
c. a 30o F air temperature and 15 MPH winds.
d. a 15o F air temperature and 30 MPH winds.
Four of the following are ecosystem services of rivers. Select the exception.
A. delivers nutrient to seas to help sustain fisheries B. purifies water C. renews and renourishes wetlands D. removes silt that accumulates in deltas E. provides habitats for wildlife
What is the most accurate description of the principle of a lightning rod?
A) The lightning rod acts to discharge the thunderstorm. B) The lightning rod intercepts the lightning and safely carries the lightning current around the object it protects. C) Lightning rods have been used since the 1700s, but the principle of their operation is not known. D) A positive charge induced in the lightning rod repels the negative charge in an approaching step leader.