Which of the following activities have contributed the greatest amount of carbon dioxide to the atmosphere over the past 100 years?
A) Increased farming and production of grains
B) Increased reliance upon coal, oil, and natural gas
C) Deforestation of rain forests and other parts of the world
D) Volcanic eruptions and widespread forest fires
B
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Argentina fire ants can be described by all of the following except:
a. They attack with painful and burning stings. b. They have killed humans, pets, and livestock. c. Some success in controlling the ants has been achieved with predatory flies. d. Native ant species help to keep them in check. e. They have spread throughout much of the southern United States.
Relatively stable, immobile parts of continents that form the foundation on which Phanerozoic sediments were
deposited are ____. a. cratons b. mobile belts c. orogens d. clastic wedges e. back-arc basins
In winter, cold-front weather is typically more violent than warm-front weather. Why? Explain why this is not necessarily true in summer.?
What will be the ideal response?
What is a stationary front?
A. a cold front that overtakes a warm front B. when neither air mass displaces the other C. a warm front that overtakes a cold front D. when neither air mass is made of cold air E. an occluded front that stops moving