Dynamothermal metamorphism (regional metamorphism) produces nonfoliated metamorphic rocks in the depths of mountain ranges, which erosion eventually exposes as "mountain roots" hundreds of kilometers wide and thousands of kilometers long.

a. True
b. False

The earth's internal process which drives seafloor spreading is

What did the native title act do? a. it recognized and protected aboriginal rights to land. b. it stated that aborigines were to be counted as part of the census. c. it established aboriginal languages as official. d. it granted aborigines suffrage.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks