The chemical formula of rust is Fe2O3. Which of the following is the correct systematic name for this compound?
A) iron oxide
B) iron(II) oxide
C) iron(III) oxide
D) diiron trioxide
C
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What type of animals are most closely associated with Australia?
A) amphibians B) birds C) marsupials D) mammals E) dinosaurs (fossils, of course)
Rills are ____
A)steep slopes where soils form slowly B)flat areas where soils form slowly C)rocky areas where soil formation is difficult D)shallow enough to be eliminated by plowing E)too deep to be eliminated by plowing
The cycling of chemical substances throughout the biosphere is accomplished through
A. vertical transfer of momentum. B. the rock cycle. C. the first law of thermodynamics. D. the work of living things and physical and chemical processes.
Which is NOT a factor that contributes to wave energy?
a. wave height b. wavelength c. density of water d. mass of moving water e. angle of approach of the wave to the beach