How does a mudflow differ from a debris flow? What will be an ideal response?
A mudflow is up to 30% water, and at least 50% clay-sized particles. A debris flow contains less water
and larger particles.
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When did the harvesting of commercial whale species cease?
A) When the International Whaling Commission formed B) When there were substitutes for the products produced from whales C) When the hunting of whales became uneconomical D) All of these choices
Most earthquakes occur due to movement on faults because of the release of energy during movement.
a. true b. false
In general, the release of toxic chemicals into the environment over the past 30 years has
A) increased dramatically in the United States, doubling about every 10 years as the U.S. population has increased. B) increased slightly in the United States, about 10% per decade, as the U.S. population has increased. C) remained steady in the world, despite increases in the world's population. D) greatly declined, by more than 60%, despite increases in the world's population.
The depth at which the rate of photosynthesis balances the rate of respiration is called the ________ depth.
Fill in the blank(s) with the appropriate word(s).