Which of the following is not a discovery made by the Hubble Space Telescope?
A) evidence for massive black holes in the center of our galaxy
B) distinction of the various rings of Saturn
C) deep space images never seen before
D) demonstration that disk shaped dust clouds are common around young stars
B
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The fact that a thermometer "takes its own temperature" illustrates
A) thermal equilibrium. B) energy conservation. C) the difference between heat and thermal energy. D) the fact that molecules are constantly moving.
Many ecosystems are damaged by attempts to make a quick profit because
A) natural services are valued more than natural goods. B) ecosystem services require sustained human development. C) the value of ecosystem services is poorly understood and underappreciated. D) the prices of most natural goods continue to fall.
What percentage of a radioactive sample remains after 5 half-lives?
A) 6.25% B) 3.13% C) 1.56% D) 0.781%
Central America, Middle America, and South America are three terms that refer to geographic areas of Latin America. Describe the areas each of the three terms represents