E-waste often leaches hazardous levels of which of the following metals?
A) lead B) uranium C) gold D) platinum E) silver
Answer: A
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What occurs during dissolution?
A) Minerals soak up water molecules. B) Both the minerals and the water are consumed resulting in new minerals. C) Mineral molecules break apart, and these molecules then disperse in water. D) Oxidation occurs.
What event triggered the main eruption of Mount St. Helens in May 1980?
A. Magma encountered groundwater and exploded. B. A landslide removed rocks and released pressure on the magma. C. Melting snow caused a huge steam eruption. D. All of these choices are correct.
Industrial smog consists mostly of
A. nitrous oxide and suspended particles. B. ozone and lead. C. sulfur dioxide, sulfuric acid, and suspended solid particles. D. lead and cement. E. methane, nitrous oxide, and sulfuric acid.
A seismic station records an earthquake that has a maximum surface wave amplitude of 50 mm and the S-wave arrives 2 seconds after the P-wave. The Richter magnitude of this earthquake is
A) 3. B) 4. C) 5. D) 6.