Oceanic phytoplankton are found in the
A) photic zone.
B) aphotic zone.
C) benthic zone.
D) intertidal zone.
A
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Which is the largest way that we are altering the carbon cycle?
A. Burning fossil fuels to make electricity. B. Making fertilizer out of atmospheric gases. C. Mining ocean sediments for phosphorus. D. Filling in natural wetlands.
Which of the following best matches the description?Condition in which warm air is sandwiched between two layers of cold air.
A. oxides of nitrogen B. photochemical smog C. primary air pollutants D. thermal inversion E. sulfur dioxide F. radon G. particulates H. secondary air pollutants I. acid deposition J. ozone K. greenhouse effect
The paleomagnetism of geologically recent rocks from different continents is generally consistent with Earth's current magnetic field, whereas ancient rocks show different orientations
Indicate whether the statement is true or false
Sundogs
A) rely on reflection and scattering. B) requires ice crystals with a specific spatial orientation. C) does not show a color spectrum. D) are found 35 degrees or more from the Sun. E) always occur in pairs.