Orogens are belts of igneous and metamorphic rocks formed by the collisions of cratons
a. True
b. False
True
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An important natural source of which of the following chemicals comes from volcanoes?
A. ozone B. benzene C. carbon monoxide D. sulphur dioxide
What is firn?
A. A deposit of debris at the toe of a glacier B. A deposit of debris at the side of a glacier C. The transitional phase between snow and glacial ice D. A crack in a glacier E. Pieces of ice that break off into a body of water
What does the following element description actually mean?hydrogen-2
A. two hydrogen atoms B. a hydrogen with two protons C. a hydrogen with one neutron and one proton D. a hydrogen with two neutrons E. a molecule of hydrogen gas
Of all the threats to biodiversity, the single greatest threat is ________
A) invasive species B) overharvesting species C) habitat destruction D) habitat fragmentation E) pollution