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 jumpsuit, goggles, a helmet, and…
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Wind
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…
What Causes Weather?
What Causes Weather? Most weather phenomena occur in the troposphere, just below the stratosphere. Weather refers to day-to-day temperature
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 t
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 cli