How has the frequency of extreme rainfall changed over the 20th century?Question 7Select one:a.It is likely that there has been an increase in the number of heavy precipitation events at the global scaleb.It is likely that there has been a decrease in the number of heavy precipitation events at the global scalec.It is likely that there have been increases in the number of heavy precipitation events in more regions than there have been decreasesd.There is low confidence that there are any robust long-term changes in the number of heavy precipitation events

Globally averaged during the second half of the 20th century, climate scientists have the "most confidence” that there have been increases in the frequency of:Question 9Select one:a.Tornadoesb.Tropical cyclonesc.Heatwavesd.Hot nights

Which of the following is NOT related to global climate change?Increased rate of species extinctionsMore intense stormsChanges in precipitation All are connected to global climate changeDrought

What is a likely result of an increase in average global temperatures on Earth?A.Falling sea levelsB.Rising sea levelsC.Fewer rainstorms and blizzardsD.More predictable weather

With increase in global temperatures, the rainfall associated with cyclones would

An increase in river flooding in the United States over the last two decades has been attributed to rising ocean temperatures by some scientists. These scientists hypothesize that increasing ocean temperatures leads to an increase in the amount of water that is evaporated into the air. This evaporated moisture eventually condenses into droplets of water, which are released during rainstorms. Most river flooding in the continental United States is caused by periods of heavy precipitation, or rainfall. Which finding, if true, would most directly support the researchers’ hypothesis?There is a correlative relationship between the number of rainstorms reported across the United States and ocean temperatures: when one increases so does the other.eliminateSince the year 2000, average ocean temperatures have increased by around 1.2° Fahrenheit.eliminateMost rivers won't flood unless there is sustained, heavy rainfall for lengths of time longer than two hours, or less heavy rainfall for lengths of time longer than five hours.eliminateThe causes of river flooding not connected to periods of heavy precipitation, for example, larger snow melts than expected, have also been on the rise in the past two decades.