We know that the universe has been expanding outward from a point because:
a) We observe "blue shift" of lights from distant galaxies
b) We have a solar system
c) We observe different planets
d) We observe "yellow shift" of lights from distant galaxies
e) We observe "red shift" of lights from distant galaxies
Ans: e) We observe "red shift" of lights from distant galaxies
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Perhaps the most important thing about Rachel Carson's investigative work on the environmental effects of pesticides, and her publication "Silent Spring," is
a. the number of errors in the book b. her failure to include a discussion about Integrated Pest Management c. that it laid the groundwork for later, more serious work d. that many historians consider her work to be an important contribution to the modern environmental movement emerging in the United States e. that it is a remarkable book considering it was written by a person without any scientific training
The wind's speed generally increases with height above Earth's surface because
a. ?only the lowest layer of air rotates with Earth. b. ?air temperature normally decreases with height. c. ?wind instruments are not accurate at Earth's surface. d. ?friction with Earth's surface slows the air near the ground. e. ?air parcels expand and become less dense as they rise above the surface.
Which of the following has been linked to the coldest years of record over the past 200 years?
a. levels of carbon dioxide b. El Niño c. the sunspot cycle d. volcanic activity
The central thesis of the theory of organic evolution is that the current diversity of species on Earth is the same as that
of the past. a. True
b. False