Common photosynthetic pigments include all of the following except ________.
A. fluorescence
B. chlorophyll a
C. phycoerythrin
D. fucoxanthin
Answer: A
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How long is this esker, in miles? (Use a string placed along the esker, then pull it straight and compare it to the scale.)
A sinuously curving, narrow ridge of coarse sand and gravel is called an esker. Eskers form along the channel of a meltwater stream that flows beneath a glacier, in an ice tunnel, or between ice walls beneath the glacier. As a glacier retreats, the steep-sided esker is left behind in a pattern roughly parallel to the path of the glacier.
Based on your understanding of the march of the seasons, which of the following is TRUE of Quito, Ecuador (0° 15' N, 78° 35' S)?
A) Quito is at a latitude that is never the subsolar point. B) At noon on June 21st, the sun is directly overhead in Quito. C) During the June Solstice, Quito experiences 24 hours of darkness because it is completely outside of the circle of illumination. D) Quito experiences days and nights of equal lengths throughout the year.
Earthquakes are most likely to occur near
A) continental shields. B) areas of volcanic activity in the interior of continents. C) areas where two tectonic plates meet. D) heavily populated areas.
After the flanks of a volcano are eroded, igneous rock that crystallized within the "throat" or "plumbing system" of the volcano may form ___
a) a neck b) a sill c) a laccolith d) a batholith e) a diapir