Scientists attribute the recent rise in atmospheric concentrations of nitrous oxide (N2O) primarily to
A) automobile combustion.
B) agricultural activity.
C) wastewater management.
D) industrial practices.
B
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A clastic sedimentary rock composed of sand-size grains (10% feldspar, 65% quartz and 25% rock fragments) would be called a
A) mixed sandstone. B) lithic sandstone. C) rock fragment sandstone. D) low quartz sandstone.
What occurs as a tsunami's circumference expands?
a. The wave height increases b. The energy dissipates c. The period increases d. The period decreases.
Evidence that Gondwana formed near the South Pole include ________
A) evidence of continental glaciation B) penguin fossils C) identification of cold temperature mammals D) paleomagnetic data from the region
Precambrian time are subdivided based on numerical dates rather than relative dating
a. True b. False