A) Decreased cloud cover B) Atmospheric particulate matter C) Increased solar activity D) Changes in Earth's orbit
A) 1940s B) 1990s C) 1980s D) 1950s
A) Sulfate aerosols B) Carbon dioxide C) Methane gas D) Water vapor
A) 20–25% B) 10–12% C) 4–5% D) 1–2%
A) It accelerated warming B) It eliminated warming C) It masked the extent of warming D) It had no effect on warming
A) It expanded significantly B) It disappeared C) It shifted southwards D) It shifted northwards
A) 1980s Amazon fire B) 1970s monsoon flood C) 1990s Sahara drought D) 1984 Ethiopian famine
A) Surface radiance B) Global brightening C) Solar intensification D) Atmospheric clearing
A) 2.0 °C B) 0.5 °C C) 1.5 °C D) 0.1 °C
A) Increase precipitation B) Counteract global warming C) Repair the ozone layer D) Reduce air pollution
A) To maintain global rainfall B) Because aerosols disperse quickly C) To prevent a rapid return of warming D) To balance solar activity
A) It stabilizes precipitation B) It increases evaporation C) It lowers evaporation D) It eliminates condensation
A) It decreased B) It increased C) It fluctuated randomly D) It remained stable
A) Industrialization has completely ceased B) Nations are acting to improve public health C) Solar activity is decreasing D) Natural filters are removing aerosols
A) Its effects on weather systems B) The altitude of release C) The cost of implementation D) The type of chemical used
A) Less sunlight was filtering through. B) Higher temperatures than at the surface. C) More ultraviolet radiation. D) Visible smog layers.
A) The Swiss Federal Weather Agency. B) A researcher from the Los Angeles Institute. C) Atsumu Ohmura. D) A group of climatologists in Estonia.
A) 6–7% per decade. B) 0.1–0.3% per decade. C) 2–3% per decade. D) 4–5% per decade.
A) Only ultraviolet radiation. B) All parts of the spectrum equally. C) Visible light and infrared radiation. D) Only radio waves.
A) Cloud cover actually increased. B) Dimming occurred even when skies were clear. C) Cloud cover has no effect on infrared radiation. D) Cloud cover completely blocks all light.
A) 1980s. B) 1970s. C) 1960s. D) 1990s.
A) Only in Swiss research journals. B) Estonia, Germany, Israel, and the former Soviet Union. C) Only in the United States. D) Across South America and Africa.
A) They increase the size of droplets B) They act as nuclei for water droplets C) They decrease the number of droplets D) They evaporate water droplets
A) They have no effect on reflectivity B) They make clouds less reflective C) They make clouds transparent D) They make clouds more reflective
A) They have no impact on rainfall B) They increase rainfall C) They decrease rainfall D) They cause flash flooding
A) Industrial coal burning B) Dimethyl sulfide from oceanic plankton C) Agricultural waste burning D) Vehicle exhaust emissions
A) Mount Pinatubo B) Mount Vesuvius C) Mount St. Helens D) Krakatoa
A) 3 million tons B) 40 million tons C) 10 million tons D) 80 million tons
A) 15 million tons B) 3 million tons C) 80 million tons D) 40 million tons
A) Smog B) Dust C) Sulfates D) Soot
A) Complete combustion B) Chemical precipitation C) Incomplete combustion D) Nuclear fusion
A) Diesel combustion B) Coal use C) Oceanic plankton D) Volcanoes
A) Forest fires B) Diesel combustion C) Agricultural burning D) Coal use
A) 7 million B) 10 million C) 1 million D) 500,000
A) New York B) London C) Denver D) Tokyo
A) 190 times B) 50 times C) 10 times D) 500 times |