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Weather - Page Text Content

BC: TEKS: 112.20. Science, Grade 8: (10) Earth and space. The student knows that climatic interactions exist among Earth, ocean, and weather systems. The student is expected to: (B) identify how global patterns of atmospheric movement influence local weather using weather maps that show high and low pressures and fronts.

FC: How the Weather Works?

1: On Earth, common weather rain, snow, fog and dust storms. Less common events include natural disasters such as tornadoes, hurricanes, typhoons and ice storms. Almost all familiar weather phenomena occur in the troposphere (the lower part of the atmosphere). Weather does occur in the stratosphere and can affect weather lower down in the troposphere, but the exact mechanisms are poorly understood.

2: How does the weather affect the water?

3: It all begins with the sun heating some places more than others. unequal heating of different surfaces that receive the same amounts of sunlight, more sunlight falls on some parts of the Earth than on others. This causes the seasons. During the Northern Hemispheres winter, the North Pole is tilted away from the sun, bringing shorter days and causing the sun to be lower in the sky. During summer, the North Pole is tilted toward the sun, which means the sun is higher in the sky and the days are longer. The sun is high in the sky in the tropics all year. This accounts for the Earths middle latitudes having distinct cold and warm seasons, while the tropics are warm and the polar regions are cold all year

4: Air temperature differences on both a small scale and a global scale cause the winds. The air temperature near the Earths surface depends mostly on the surface temperature, because sunlight hardly heats the air as it passes through it. This means that the air above cool ground or water will become cool, and air above warm ground or water will warm up. Thus, variations in ground or water temperatures create different air temperatures around the globe and, to a smaller degree, over land and water. Warm air is light and tends to rise, while cold air is heavy and tends to sink. This is what causes the winds.


8: The Earth is rotating, and this causes air that would be flowing toward and away from the poles to turn. The effect of the Earths rotation, known as the Coriolis force, combines with other forces that drive the winds to create huge wind spirals known as high- and low-pressure areas.

9: The amount of water vapor, or humidity, the air can “hold” depends on the air's temperature. Warm air can “hold” more water vapor than cool air. Anything that cools the air will cause water vapor to condense.The higher you go, the less the pressure of the air. The air's pressure depends on the weight of air above the place where you're measuring the pressure. The higher you go, the less air there is above you. Therefore, the pressure decreases. If you lower the pressure of the air, the air will cool. If you increase air pressure, it warms the air.Rising air causes clouds and precipitation. Sinking air tends to clear the sky. In areas of low pressure at the surface, air is rising. In areas of high pressure at the surface, air is sinking. As a result, low pressure is usually associated with clouds and precipitation, while high pressure usually brings clearer skies.

10: WEST KRABI COAST | November 10

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  • By: demeshia t.
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About This Mixbook

  • Title: Weather
  • Weather Patterns and how it changes.
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  • Published: almost 6 years ago