Is carbon-14 an appropriate isotope for dating the metamorphic rocks at the bottom of the Grand Canyon? Explain
What will be an ideal response?
Answer: No, it's not. The rocks at the bottom of the Grand Canyon are igneous and metamorphic, and they are also really, really old. Carbon-14's usefulness is limited to living things (which consume carbon-14 every time they photosynthesize or eat) from the relatively recent past (because carbon-14 has such a short half-life, it decays very quickly over geologic time).
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The iron in banded iron formations is found in this form:a
iron sulfides d. iron carbonates b. iron oxides e. none of the above c. iron silicates
Why has integrated waste management been criticized?
A) overemphasis on recycling B) results of waste reduction averaging less than 10% C) goals that are incompatible with environmental protection D) overregulation of hazardous wastes
An area defined by characteristic, long-term weather patterns is called
A) an ecosystem. B) a climatic region. C) a biome. D) an average weather place.
Not all jet streams form at the tropopause
a. True b. False