In the world map below, the color that represents the soil type with the most ideal balance between leaching and retention of nutrients is
A) dark green.
B) pink.
C) medium blue.
D) purple.
A) dark green.
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What evidence indicated that Mount St. Helens was going to erupt?
A. Changing shape B. Gas emissions C. Earthquakes D. All of the choices are correct
Why is the formation of iron hydroxide, Fe(OH)2, from Fe2+ and OH- not considered an oxidation-reduction reaction?
A. The iron is only oxidized and nothing is reduced. B. The iron is only reduced, not oxidized. C. Iron can never be oxidized or reduced. D. The Fe2+ ion is not changed during this chemical reaction.
What is a food taboo and how does that influence the availability of pork around the world?
What will be an ideal response?
Which of the following pairs engage in hydrogen bonding?
A) water with methanol, CH3OH B) two molecules of methane C) both a and b D) neither a nor b