Describe the formation of Crater Lake. Compare it to the calderas found on shield volcanoes, such as Kilauea
What will be an ideal response?
This caldera formed about 7000 years ago when a composite cone, named Mount Mazama, violently extruded 50 to 70 cubic kilometers of pyroclastic material. With the loss of support, 1500 meters of the summit of this once prominent cone collapsed, producing a caldera that eventually filled with rainwater.
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The balance or lack of balance between accumulation and wastage is called ________
A) glacial trough B) glacial ice C) glacial budget D) glacial plucking
When did dinosaurs, exclusive of birds, become extinct?
A. 6,600 years ago B. 66 million years ago C. 660 million years ago D. 6.6 million years ago
The winter solstice marks the shortest night of the year in the Northern Hemisphere
a. True b. False
The theory of ______ ______ emerged from observations of island ecosystems in the West Indies. It states that the number of species found on an individual island correlates with the island's area
Fill in the blank(s) with correct word