The IPCC concludes that the largest cause of current global warming is ________
A) natural
B) mistakes in the work done by scientists
C) the increase in atmospheric ozone
D) the decrease in atmospheric water vapor
E) anthropogenic
Answer: E
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Which of the following terms refers to a tornado-like event that forms over water?
A. It is the level of the troposphere where the temperature is 0°C. B. It marks the height of the cloud base of a thunderstorm. C. It is the level where the anvil head of a cumulonimbus cloud forms. D. It is the level where entrainment begins.
Which of the following factors indicates a high risk for volcanic mudflows or lahars?
A) A shield volcano that forms a low mountain in the tropics B) A volcano whose hillslopes are covered with hard basaltic lava C) A volcano with a thick covering of snow or ice D) All of these are correct.
Coffee and cream is best classified as
A. a suspension B. a heterogeneous mixture C. a solution D. an element E. a compound
What percentage of the world's plant and animal species are found in tropical rainforests?
A) 40% B) 10% C) 20% D) 50% E) 30%