6. the place where the sun passes through zenith just once per year [a] north pole [b] tropic of cancer [c] arctic circle [d] equator [e] none of the above

Evaporite rocks te more permeable than reef rocks true false

The causes of the failure of the league of nations

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