By Paul Fleisher
Why does the wind blow? What does air strain need to do with a thunderstorm? Why is a mountaintop snowy whereas the valley less than is hot? The solutions to those questions all contain the layer of air surrounding Earth--the surroundings. Earth's surroundings is usually in movement. It strikes clouds, storms, and hot and chilly air from one a part of the planet to a different. during this fact-packed publication, observe how the ever-changing surroundings determines climate all over the world.
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Extra info for Gases, Pressure, and Wind: The Science of the Atmosphere
The amount of water vapor in the air is always changing. The warmer the air, the more water vapor it can hold. Humidity is the measure of how much water vapor is in the air. When a lot of water vapor is in the air, we say the air is humid. Air can be as much as 4 percent water vapor on hot days. On cold, clear days, water vapor makes up less than 1 percent of the air. 31 Evaporation and Condensation Water enters the air by evaporating, or changing from liquid to gas. Most water vapor in the air evaporates from the oceans.
But Earth is turning eastward beneath it. The surface moves by at a faster and faster rate. To a viewer on Earth, the rocket would seem to turn right—in this case, toward the west. All moving objects experience the Coriolis effect, including air. And it works for objects traveling in any direction. The faster an object moves, the stronger the effect. The Coriolis effect is strongest at the poles. It disappears at the equator. In the Northern Hemisphere, the Coriolis The Coriolis Effect effect turns high pressure systems in a clockwise direction.
The droplets become clouds. The clouds release the water in the form of rain or snow. The water leaves the atmosphere and returns to Earth’s surface. 32 GASES, PRESSURE, AND WIND Some of the water in this bottle has evaporated and then condensed into droplets at the top of the bottle. Dew forms on the ground and other surfaces as they cool overnight. Water vapor from the air condenses to form droplets on the surface. When water vapor condenses, it releases the energy stored in it. This energy warms the surrounding air.