A hydroxide ion
A. is a water molecule plus a proton.
B. is a water molecule plus two extra electrons.
C. and a water molecule are the same things.
D. is a water molecule minus a hydrogen nucleus.
Answer: D
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You are an archaeologist researching artifacts left behind by Francisco Pizzaro's conquest of Peru in the 1530s. In order to confirm the authenticity of the leather artifacts, you are performing radiometric dating using an isotope pair that has a half-life of 250 years. In order for the artifacts to date back to the time of Pizzaro's conquest, approximately how much original radioactive isotope must be left in the artifacts?
A) 50% B) 25% C) 75% D) 12.5%
Discuss the stratigraphy of the Tippecanoe Sequence. What types of rocks are found in this
sequence? What will be an ideal response?
What kind of metabolic rate do humans have?
a. Endothermic b. Exothermic c. Ectothermic d. Hyperthermic
Defend or critique Julian Simons’ principle of substitutability with regard to land, habitat, water, and air.
What will be an ideal response?