Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is:
a. aphanitic.
b. porphyritic.
c. glassy.
d. phaneritic.
e. pyroclastic
A
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Which of the following is NOT associated with the Milankovitch astronomical theory of climate change?
A) lunar phases B) eccentricity C) obliquity D) precession
Palynology involves the examination of annual tree rings exposed by cores drilled through the middle of certain tree species to produce records of past climate
a. True b. False Indicate whether the statement is true or false
When we look at the earth and the general distribution of human population, two main factors attract human habitation: moderate climates and access to water.
a. true b. false
In which of these settings would a river or lake lose water to groundwater?
A. where a river flows across an area where the water table is far beneath the surface B. where the water table adjacent to the river is higher than the river C. where a lake is directly underlain by an impermeable layer D. None of these.