Which color portion of the visible spectrum emits the lowest amount of energy?
A. yellow
B. red
C. green
D. blue
Answer: B
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The carbon dioxide cycle is important to Earth because it
A. prevents the gradual buildup of oxygen, which would eventually lead to a combustible atmosphere. B. helps sustain the planet's plant base. C. has been recognized by the Nobel Prize award committee. D. and the oceans are critical in moderating and regulating the Earth's temperatures.
Itinerant businesses are those that
A) are only open seasonally. B) are based on providing convenience items. C) agglomerate services to save travel costs. D) travel from place to place to sell their goods.
What is used to visualize ocean layering?
a. A caballing chart b. A circulation histogram c. A layering table d. A temperature-salinity diagram
What are the major sources of air pollutants in the United States?
A) agriculture and chemical processing B) evaporation (especially in the Southwest) and desertification C) hydropower and biomass consumption D) deforestation and topsoil depletion E) industry and transportation