The scattering effect of dry haze produces a ____ color when viewed against a dark background and a ____ tint when viewed against a light-colored background
a. ?yellowish; bluish
b. ?bluish; yellowish
c. ?reddish; yellowish
d. ?yellowish; reddish
e. ?whitish; silvery
ANSWER: b
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The cost of natural disasters is ____.?
a. ?increasing steadily each year due to population growth b. ?increasing steadily each year due to economic growth c. ?variable from year to year due to the unpredictability of natural disasters and their effects d. ?increasing steadily each year due to population and economic growth e. ?decreasing steadily each year due to improved forecasting and public awareness
Which of the following best matches the description?Radiation consisting of electrons released from the nuclei of many fissionable atoms.
A. U-235 B. transuranic waste C. radiation D. nuclear breeder reactor E. radioactive half-life F. heavy-water reactor G. beta radiation H. alpha radiation I. light-water reactor J. decommissioning K. gamma radiation L. rem M. nuclear fusion N. thermal pollution O. moderator P. nuclear fission
Population growth and fertility rates are lowest in
A) upper-income countries. B) upper- and middle-income countries. C) middle- and low-income countries. D) low-income countries.
The Mississippi is only slightly smaller than the Amazon river
Indicate whether the statement is true or false