Prime Minister Tony Abbott of Australia is working on a free trade agreement with China. If the Parliament does not like his plans, they may think he is doing a poor job. What does Mr. Abbott need to worry about?

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

Southeast asia relies on its many because of the volcanic, mountainous terrain. a. highways c. rivers b. airports d. lakes

Who developed the theory of plate tectonics?