weneger examines the location of tiny rocks and the direction of grooves formed by large glaciers scraping across southern area of africa, south america, australia and india. he concludes that if all these places were fitten together, they would form a continuos ice sheet expanding outward in all directions

[fw.02]sinkholes are often formed as a result of the actions of. a.heat on recharge b.pressure on aquifers c.acid in groundwater d.minerals in hot springs

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

What are economic benefits of building dams