Some preliminary scientific results will be validated and classified as reliable, while some will be discredited and classified as unreliable. Until one of those two things happen, these results are viewed as ____.
A. theories
B. proof
C. tentative science
D. biased
E. uncontrolled experiments
Answer: C
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A skydiver steps from a helicopter and falls for 5 s before reaching her terminal velocity. During this 5-s interval, her acceleration
A) is constant. B) increases. C) decreases. D) is zero. E) none of the above
Using the IPAT or ImPACT formula, which of the following would most likely reduce the environmental impact of a society?
A) Construction of industrial plants by wealthy nations to draw on cheaper labor B) The discovery of large reserves of fossil fuels within a nation's borders C) Increased use of electricity and natural gas by most members of a society D) Greater use of birth control by most members of a society
A valley breeze has more in common with a katabatic wind than does a mountain breeze
Indicate whether the statement is true or false
Which two clouds can produce precipitation?
a. ?cumulonimbus and stratocumulus b. ?nimbostratus and altostratus c. ?nimbostratus and cirrus d. ?cumulonimbus and nimbostratus e. ?cirrus and stratocumulus