Which of the following contains two species which have the same mass number?

A) 14C, 14N
B) 12C, 13C
C) both a and b
D) neither a nor b


A

Environmental & Atmospheric Sciences

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Granite is ________

A) fine-grained and dominated olivine, pyroxene and plagioclase feldspar crystals B) coarse-grained and dominated by quartz and feldspar crystals C) coarse-grained and dominated by olivine, pyroxene and plagioclase feldspar crystals D) fine-grained and dominated by quartz and feldspar crystals

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The process of ________ allows organisms to use inorganic molecules as an energy source.

A. cellular respiration B. photosynthesis C. chemosynthesis D. phosphorylation 

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The present weather depicted by this station model is

A) light snow. B) light rain. C) moderate rain. D) heavy rain.

Environmental & Atmospheric Sciences