Which of the following is not a nonmetal?
A. sulfur (atomic no. = 16)
B. titanium (atomic no. = 22)
C. selenium (atomic no. = 34)
D. helium (atomic no. = 2)
E. xenon (atomic no. = 54)
Answer: B
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Which of the following places are the coldest areas of the northern hemisphere?
A. at the centre of large bodies of water B. on the periphery of large land masses C. in the interior of large land masses D. in coastal waters
The main cause of caldera collapse is
A) a fissure eruption that allows the shield volcano to split into two or more parts. B) collapse of the north flank by landslides. C) removal of magmas that form pillow basalt. D) collapse of the roof of a magma chamber as magma erupts. E) All of these are correct.
Water particle orbits for a shallow water wave are ________.
A. circular and extend to the seafloor B. circular and extend halfway to the seafloor C. elliptic and enlarge with depth D. circular at the surface and elliptical at the sea floor E. elliptic and flatten with depth
The term periglacial refers to
A) areas permanently frozen ground not covered by glaciers. B) areas that are on top of a glacier. C) regions that are too warm for ground ice. D) process and effects that existed during the last ice age. E) regions which experience winter freezing and summer melt.