What is the Richter Scale? A. the scale that measures global unemployment B. the scale that measures the magnitude of earthquakes C. the scale that measures disease outbreaks worldwide D. the scale that measures damage caused by earthquakes

What would be the distance of all the planets to the sun in astronomical units?

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

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal