Plants appear green to us because they ____
a. absorb green wavelengths
b. reflect blue wavelengths
c. reflect green wavelengths
d. absorb all visible wavelengths
e. reflect all visible wavelengths
ANSWER: c
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The Ring of Fire is famous among geologists because
A. 55% of the world's volcanoes occur here. B. 90% of earthquakes and 75% of the world's volcanoes occur here. C. 75% of the world's hurricanes occur here. D. 80% of earthquakes occur here.
Who proposed the concept of continental drift—a precursor to plate tectonics?
a. James Hutton b. William Smith c. Charles Darwin d. Abraham Werner e. Alfred Wegener
Long-range forecasts
A) typically do not include time spans longer than three weeks. B) do not rely on subjective judgment. C) use numerical models. D) are too complex to make use of statistics.
________ is the physical arrangement of soil that facilitates aeration
A) Horizons B) Tilth C) Coversion factor D) pH E) Bedrock geology