Ore deposits

a. are distributed uniformly throughout the earth's crust

b. are rock units that have a significant concentration of metals

c. are minerals that contain a high amount of lead (pb)

d. have diffuse metal ions bonded to nonmetallic elements in a variety of minerals

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

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Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?