Sun's Effect on Weather


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Basic overview of how the Sun effects Earth's weather.

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Sun's Effect on Weather

  1. 1. The Sun’s Effect on Weather
  2. 2. Contents <ul><li>The Sun’s Key Roles </li></ul><ul><li>Effects on Earth’s weather </li></ul><ul><li>Moving Air: The Wind </li></ul><ul><li>Evaporation </li></ul><ul><li>Hurricanes </li></ul>
  3. 3. What is the Sun?? <ul><li>The Sun is a star, the closest star to planet earth. </li></ul><ul><li>It is the largest object in the solar system, contains 99.8% of the total mass. </li></ul><ul><li>It is estimated to be about 4.5 billion years old. </li></ul> 72157623527696147/ Let’s take a look!!
  4. 4. The Sun’s Key Roles <ul><li>The sun supplies light and heat to our solar system. </li></ul><ul><li>The sun is the Earth’s major source of heat energy. </li></ul><ul><li>The Sun’s heat sustains life and controls our climate. </li></ul>
  5. 5. The Sun’s Key Roles <ul><li>The Sun keep the temperature of most of the Earth’s surface at 51 to 49 degrees Celsius. </li></ul><ul><ul><li>Most living things can only survive at 0 to 49 degrees Celsius. </li></ul></ul><ul><li>Did You Know : If the amount of sunlight reaching the Earth was cut by 1/10th, the oceans would turn to ice and life on Earth would cease to exist. </li></ul>
  6. 6. Sun’s Effect on Weather <ul><li>The Sun is a major contributor to the world’s weather. </li></ul><ul><li>The Sun’s heat warms the Earth’s land and water surfaces. </li></ul><ul><li>The Earth absorbs the heat and releases it into the atmosphere, which heats the air above, and causes moving air. </li></ul><ul><li>The movement of air causes winds which lead to weather changes. </li></ul>
  7. 7. Sun’s Effect on Weather
  8. 8. The Wind <ul><li>The absorption and release of heat energy into the atmosphere results in moving air, also known as Wind. </li></ul><ul><li>The air moves, because the surface is unevenly heated. (some surfaces absorb heat faster than others) </li></ul><ul><li>With movement, the air pressure (weight of air pressing on everything around it) changes, these changes affect weather. </li></ul>
  9. 9. The Wind: Sea Breeze <ul><li>On a Beach : When land heats up faster than water, air above land becomes warmer than air above water. </li></ul><ul><li>The warm land air rises, and is replaced by cool moving air from above the water. </li></ul><ul><li>This is known as a breeze (or Sea Breeze) </li></ul><ul><li>This type of air movement can happen anywhere where the surfaces are unevenly heated. </li></ul>
  10. 10. The Wind: Sea Breeze
  11. 11. Evaporation <ul><li>One factor that affects air and weather is water vapor. </li></ul><ul><ul><li>Creates Air Moisture </li></ul></ul><ul><li>Evaporation is the process of changing liquid to gas. When Earth’s liquid water (oceans etc…) evaporates, it releases gas called water vapor. </li></ul><ul><li>Heat from the Sun speeds up evaporation </li></ul>
  12. 12. Evaporation <ul><li>The water vapors are held in the atmosphere, as air cools, the vapors become condensation (tiny droplets of water that form clouds) </li></ul><ul><li>When the droplets grow larger and get too heavy, they fall back to Earth as precipitation: </li></ul><ul><ul><li>rain, snow, hail, or sleet. </li></ul></ul>
  13. 13. Evaporation <ul><li>Water vapors in the air causes humidity. </li></ul><ul><li>Humidity and temperature combined causes moving air masses, which results in weather front. </li></ul><ul><ul><li>Cold Front – moving mass of cool air </li></ul></ul><ul><ul><li>Warm Front – moving mass of warm air </li></ul></ul>
  14. 14. Evaporation and Air Movement Let’s take a look at this process, click on the umbrella!!! <ul><li>Water vapors in the air cause humidity. Humidity and temperature combined causes moving air masses, which results in weather fronts. </li></ul><ul><li>A front refers to the “front or leading” edge of a moving air mass: </li></ul><ul><ul><li>Cold Front – leading edge of a mass of cool air </li></ul></ul><ul><ul><li>Warm Front – leading edge of a mass of warm air </li></ul></ul>
  15. 15. Hurricanes <ul><li>Weather Fronts can lead to severe weather, such as Hurricanes. </li></ul><ul><li>Hurricanes are large, violent tropical storms with wind speeds greater than 117km/hr </li></ul><ul><li>Hurricanes begin as thunderstorms over warm water, the heat from the water, wind, and moisture help fuel the storm. </li></ul>
  16. 16. Hurricanes <ul><li>Hurricane winds move counterclockwise, while the eye of the storm (middle) remains calm. </li></ul><ul><li>Let’s take a look at the movement of a hurricane. </li></ul><ul><ul><li> </li></ul></ul>
  17. 17. Lesson Recap: <ul><li>The Sun’s Key Roles </li></ul><ul><li>Effects on Earth’s weather </li></ul><ul><li>Moving Air: The Wind </li></ul><ul><li>Evaporation </li></ul><ul><li>Hurricanes </li></ul>
  18. 18. Online Resources <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>