The first scientific voyage to use an echo sounder on a large scale was the ________.
A. Meteor expedition
B. Discovery expedition
C. Endeavor expedition
D. Fram expedition
E. Beagle expedition
Answer: A
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The difference between industrial and photochemical smog is that photochemical smog ____.
A. is produced by stationary sources rather than mobile ones B. contains secondary pollutants formed under the influence of UV radiation from the sun C. contains carbon dioxide D. is not related to coal burning E. involves reactions with oxygen
Which of the following is NOT likely to be a consequence of climate change?
A. changes in ocean currents B. increased stability in temperatures C. some regions getting warmer, others colder D. changes in the distribution of plants and animals
Today, which land area in the Northern Hemisphere is largely covered by an ice sheet?
A. North America B. Asia C. Europe D. Greenland
Using the telescope, Galileo discovered that the planet Mars had polar ice caps not unlike those on Earth
Indicate whether the statement is true or false