The problem known as sediment pollution is a major environmental issue. Which of the following is a problem associated with sediment pollution?
A. any pollution that causes crops to become unfit to eat
B. compaction reduces crop production
C. buildup of heavy metals makes soils toxic and unusable
D. too much fertilizer makes soils toxic and unusable
E. excess sediment in stream channels increases flooding
Answer: E
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In a battery, the following two oxidation-reduction reactions are taking place:rxn A: Zn + 2 OH- ? ZnO + H2O + 2e- rxn B: 2 MnO2 + H2O + 2e- ? Mn2O3 + 2 OH-What is undergoing reduction?
A. OH- B. MnO2 C. ZnO D. Zn E. H2O
Slipher made the observation that galaxies rotated and moved relative to each other. Hubble expanded on this work to show that ________
A) the rates of rotation varied within galaxies B) the relative motion between adjacent galaxies varies C) all galaxies except those in the Local Group are moving away from the Milky Way D) galaxies within the Local Group rotate less than other galaxies E) galaxies within the Local Group rotate more than other galaxies
Cities in many developing nations have a disproportionately high share of their nation's wealth.
Answer the following statement true (T) or false (F)
Any animal that eats low-growing vegetation, especially grasses, is a(n) ____
a. carnivore b. browser c. grazer d. carnivore-scavenger e. autotroph