Which of the following is considered a biological human health hazard?
A) pollutant
B) cigarette smoking
C) earthquake
D) malaria exposure
E) collisions
D
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All countries have an official language.
a. true b. false
In the Cenozoic, the western margin of North America ____
a. changed from a subduction zone to a transform boundary b. changed from a transform boundary to a subduction zone c. changed from a subduction zone to a passive margin d. changed from a subduction zone to an divergent zone e. remained stable and unchanged
"The oceanic crust is older than the continental crust because it is deeper." Evaluate this statement
A) This statement is true. The continental crust floats much higher on Earth's surface than the oceanic crust. B) This statement is false. The oceanic crust experiences more subduction and is younger than the continental crust. C) This statement is true, but the speaker should have also mentioned that the oceanic crust is known to be older by the type of rock it is (basalt). D) This statement is false. The land that is now considered continental was previously oceanic crust, so this comparison is meaningless.
________ bonds result from the sharing of electrons between many atoms
Fill in the blank(s) with correct word