The chemical erosion of stream channels is known as ______.
a - erosion
b - turbulence
c - competence
d - abrasion
e - corrosion
e - corrosion
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The five major factors contributing to extinction today are ________
A) habitat loss, invasive species, pollution, overexploitation, and climate change B) catastrophic storms, invasive species, earthquakes and associated tsunamis, pollution, and agriculture C) air pollution, water pollution, toxic waste, ozone depletion, and agriculture D) hunting, fishing, habitat destruction, crop production, and the draining of wetlands
The 1964 tsunami that killed 12 people at Crescent City, California, was caused by a major earthquake in ________.
A. Chile B. Japan C. Alaska D. Washington E. Hawaii
Fossilized tree sap, also known as ________, prevents scavengers, water, and oxygen from getting to the organism and destroying its remains.
A. amber B. carbonization C. mineral replacement D. hard part preservation
Why does the magma from some volcanoes flow smoothly and relatively peacefully, while the magma from other volcanoes blasts forth violently and deals death over wide areas?
A. variations in the temperature, water and gas content, and viscosity of magmas B. differences in the chemical and mineral makeup of magmas C. different geographic positions with respect to hot spots and edges of tectonic plates D. All of these choices are correct.