Adding iron to the surface of the ocean has been shown to ________.
A. make no difference to phytoplankton production
B. have no impact on phytoplankton community composition
C. increase phytoplankton production for an initial short period
D. be toxic to phytoplankton production
E. All of these are false; this experiment has never been tried.
Answer: C
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As sunlight shines on its leaves, a bean plant uses the light from photosynthesis to make beans. This entire process represents the
A) generation, collection, and conversion of energy. B) storage of energy, collection, and conversion. C) conversion, collection, and storage of energy. D) collection, conversion, and storage of energy.
When considering hydrothermal deposits, vein- or fissure-filling deposits of metallic ores such as gold or silver are common in ________
A) rocks of a contact-metamorphic zone that formed around a shallow granite pluton B) pyroclastic materials erupted from a stratovolcano C) impact structures from meteorites D) rocks that form in high-pressure subduction zones
Which type of coal has the least amount of moisture and the greatest amount of fixed carbon?
A. peat B. anthracite C. bituminous D. lignite
________ is defined as the number of protons plus the number of neutrons
A) Isotopic number B) Atomic number C) Mass number D) Nuclear number E) Ionic number