How Do Vertical Wind Tunnels Work?
How Do Vertical Wind Tunnels Work? The invention of large machines called vertical wind tunnels launched an entirely new sport: indoor skydiving! After donning a...
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What Is Whit Monday or Pentecost Monday?
Whit Monday or Pentecost Monday (also known as Monday of the Holy Spirit) is the holiday celebrated the day after Pentecost, a moveable feast in the Christian calendar....
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What Causes Weather?
What Causes Weather? Most weather phenomena occur in the troposphere, just below the stratosphere. Weather refers to day-to-day temperature and precipitation activity,...
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What Makes Hail?
During a thunderstorm, balls of ice, called hail, may fall. Hail starts as rain. Before the drops can fall, strong air currents carry them to the upper part of the...
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How Do Clouds Move in the Sky?
How Do Clouds Move in the Sky? Clouds are formed when water evaporates from rivers, ponds, oceans, and lakes. The tiny droplets of water cling to particles like (dust,...
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