You are in the lab performing gas chromatography on fluids from a víctim presumed dead due to poisoning. You find evidence of
formaldehyde and formic acid. What might you deduce as the method
of poisoning?

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Which substances have the lowest melting points: ionic covalent, or metallic

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering