________ temporarily migrate to take jobs in other countries and send money back to their home communities
A) Guest workers
B) Refugees
C) Voluntary migrants
D) International forced migrants
E) Transmigrants
Answer: A
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ANS: D
There are large ranges of sizes in sediments. Most marine sediments are comprised of finer particles like clay, silt, and sand. These particles are easily transported throughout the ocean. Information can be found in the section Sediments May Be Classified by Particle Size.
Which of the following must have occurred in order for the inner planets to grow?
A) explosions in the Sun B) solar wind blasted gases out of the nebula C) temperatures cooled throughout the nebula D) dust was delivered to the nebula by asteroids and meteors
The longevity of nuclear power plants has averaged about
A) 20 to 25 years due to unexpectedly high levels of corrosion and embrittlement. B) 40 to 50 years, longer than imagined, because neutrons tend to stabilize the building materials. C) 10 years, only about 25% of their expected life, due to the need for new government-mandated safety designs. D) 40 years, as expected, due to routine maintenance and the replacement with new longer-lasting materials.
The principle behind a hybrid electric vehicle is that it
A) runs with conventional fuel but the motor shuts off when going downhill. B) has a battery-powered electric motor in addition to a conventional engine. C) has a small nuclear reactor in addition to a conventional engine. D) runs on its electric battery except when starting the engine or travelling at speeds in excess of 90 mph.