1. The theory of continental drift suggests that the 1) continents moved due to changes in the Earth's orbital velocity
2) continents moved due to the Coriolis effect caused by the Earth's rotation
3) present-day continents of South America and Africa are moving toward each other
4) present-day continents of South America and Africa once fit together like puzzle
parts

20 points

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