Precipitation forms by the ice crystal process when:
a. clouds contain both ice crystals and liquid droplets
b. the liquid droplets within a cloud are supercooled.
c. cloud temperatures are below freezing.
d. All of these choices.
d
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The final stage for a star which is as massive as the Sun is a ________
A) black hole B) main-sequence star C) white dwarf D) red giant
The island of Madagascar is located just off the SE coast of Africa, in the Indian Ocean. Scientists find species on this island that have close biological relatives in both Australia and India. They also find that at each location there are fossils of similar organisms. What is the most likely explanation for this similarity between organisms in Madagascar, India, and Australia?
a. These organisms were moved back and forth to these different places by humans in recent geological history. b. They are on the same side of Wallace's line. c. he organisms were introduced to all three places by extraterrestrial beings. d. The ancestor of these organisms lived on a landmass long ago that included Madagascar, India, and Australia. e. These organisms independently arose by natural selection in each location.
Which of the following is the only substance that is found naturally in the atmosphere near the Earth's surface as a solid, a liquid, and a gas?
A. water B. carbon dioxide C. ozone D. molecular oxygen
Development along transportation routes is referred to as
A. ribbon sprawl. B. urban sprawl. C. a megalopolis. D. tract development.