About half of Earth's crust consists of compounds containing
A) carbon dioxide.
B) ozone.
C) oxygen.
D) nitrogen.
E) argon.
C
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Which of the following is a byproduct in the production of soaps?
A) glycerol B) triglycerides C) ethanol D) none of these
Which classification scheme is correct taxonomy going from general to specific? (NOT all categories are considered.)
a) Kingdom, family, order, phylum, species, class b) Species, genus, family, phylum, order, kingdom c) Order, family, class, kingdom, phylum, class d) Kingdom, phylum, class, order, family, genus, species e) Kingdom, phylum, order, class, species, genus
The predominate system of agriculture practiced in Subsaharan Africa is
A) subsistence cultivation. B) intensive subsistence wet rice dominant. C) mixed crop and livestock. D) pastoral nomadism. E) dairy.
The temperature scale that sets freezing of pure water at 32o F:
a. Kelvin b. Fahrenheit c. Celsius d. British