Question 1
What is the name for a long period, lasting millions of years, during which the Earth has permanent ice sheets at one or both poles, within which the climate swings between colder 'glacial' spells when ice advances far toward the Equator and milder 'interglacial' spells like the present?
Question 2
Which gas, making up about 0.04 percent of the atmosphere, is released by burning fuel, by breathing and by volcanoes, is taken up by plants and the oceans, and is the single most important of the long-lived gases driving present-day global warming?
Question 3
What is the name for a fast-moving band of severe thunderstorms that produces a long, nearly straight swath of destructive wind, at least 400 kilometres in length, with gusts widely above 93 kilometres per hour, causing damage that can resemble a tornado's but is spread across whole states?
Question 4
What informal name is given to the broad corridor of the central United States, running roughly from Texas through Oklahoma and Kansas into Nebraska, that experiences the world's highest frequency of strong tornadoes each spring?
Question 5
What is a violently rotating column of air in contact with both the ground and the base of a thunderstorm, often visible as a funnel of cloud and debris, that can pack the fastest winds on Earth, over 480 kilometres per hour, across a track usually only a few hundred metres wide?
Question 6
What is the name for the tendency of a city to be several degrees warmer than the countryside around it, especially at night, because dark roofs and asphalt soak up sunshine by day and release it slowly, buildings block the sky, and there is little vegetation to cool the air by evaporation?
Question 7
What optical display appears as an arc of colours when sunlight enters raindrops, bends, reflects off the back of each drop and bends again on the way out, spreading white light into its spectrum and always appearing in the part of the sky directly opposite the Sun?
Question 8
What is the name for the intense, narrow bands of snow that form when a cold, dry airflow crosses a relatively warm, unfrozen body of water, picking up heat and moisture and dumping it as heavy snow on the far shore, sometimes a metre or more in a day just downwind while a few kilometres away stays clear?
Question 9
Which five-step scale rates the strength of a hurricane by its sustained wind speed, running from Category 1 at 119 kilometres per hour to Category 5 above 252, with a rough guide to the damage each level causes? 
Question 10
What is the name for the abnormal rise of seawater pushed ashore by a hurricane's winds and low pressure, which can raise the coastal water level by several metres on top of the normal tide and is historically the deadliest part of such storms? 
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