Sunpresentation 110313160001-phpapp02
- 1. The Sun’s Effect on WeatherThe Sun’s Effect on Weather
- 2. ContentsContents The Sun’s KeyThe Sun’s Key RolesRoles Effects on Earth’sEffects on Earth’s weatherweather Moving Air: TheMoving Air: The WindWind EvaporationEvaporation HurricanesHurricanes
- 3. What is the Sun??What is the Sun?? The Sun is a star, the closest star to planet earth.The Sun is a star, the closest star to planet earth. It is the largest object in the solar system,It is the largest object in the solar system, contains 99.8% of the total mass.contains 99.8% of the total mass. It is estimated to be about 4.5 billion years old.It is estimated to be about 4.5 billion years old. http://www.flickr.com/photos/gsfc/4445502369/in/set 72157623527696147/ Let’s take a look!!
- 4. The Sun’s Key RolesThe Sun’s Key Roles The sun supplies light and heat to our solarThe sun supplies light and heat to our solar system.system. The sun is the Earth’s major source of heatThe sun is the Earth’s major source of heat energy.energy. The Sun’s heat sustains life and controls ourThe Sun’s heat sustains life and controls our climate.climate.
- 5. The Sun’s Key RolesThe Sun’s Key Roles The Sun keep the temperature of most of theThe Sun keep the temperature of most of the Earth’s surface at 51 to 49 degrees Celsius.Earth’s surface at 51 to 49 degrees Celsius. – Most living things can only survive at 0 to 49Most living things can only survive at 0 to 49 degrees Celsius.degrees Celsius. Did You KnowDid You Know: If the amount of sunlight: If the amount of sunlight reaching the Earth was cut by 1/10th, thereaching the Earth was cut by 1/10th, the oceans would turn to ice and life on Earthoceans would turn to ice and life on Earth would cease to exist.would cease to exist.
- 6. Sun’s Effect on WeatherSun’s Effect on Weather The Sun is a major contributor to the world’sThe Sun is a major contributor to the world’s weather.weather. The Sun’s heat warms the Earth’s land andThe Sun’s heat warms the Earth’s land and water surfaces.water surfaces. The Earth absorbs the heat and releases it intoThe Earth absorbs the heat and releases it into the atmosphere, which heats the air above, andthe atmosphere, which heats the air above, and causes moving air.causes moving air. The movement of air causes winds which leadThe movement of air causes winds which lead to weather changes.to weather changes.
- 7. Sun’s Effect on WeatherSun’s Effect on Weather
- 8. The WindThe Wind The absorption and release of heat energy intoThe absorption and release of heat energy into the atmosphere results in moving air, alsothe atmosphere results in moving air, also known as Wind.known as Wind. The air moves, because the surface is unevenlyThe air moves, because the surface is unevenly heated. (some surfaces absorb heat faster thanheated. (some surfaces absorb heat faster than others)others) With movement, the air pressure (weight of airWith movement, the air pressure (weight of air pressing on everything around it) changes, thesepressing on everything around it) changes, these changes affect weather.changes affect weather.
- 9. The Wind: Sea BreezeThe Wind: Sea Breeze On a Beach: When land heats up faster than water, air above land becomes warmer than air above water. The warm land air rises, and is replaced by cool moving air from above the water. This is known as a breeze (or Sea Breeze) This type of air movement can happen anywhere where the surfaces are unevenly heated.
- 10. The Wind: Sea BreezeThe Wind: Sea Breeze
- 11. EvaporationEvaporation One factor that affects air and weather is waterOne factor that affects air and weather is water vapor.vapor. – Creates Air MoistureCreates Air Moisture Evaporation is the process of changing liquid toEvaporation is the process of changing liquid to gas. When Earth’s liquid water (oceans etc…)gas. When Earth’s liquid water (oceans etc…) evaporates, it releases gas called water vapor.evaporates, it releases gas called water vapor. Heat from the Sun speeds up evaporationHeat from the Sun speeds up evaporation
- 12. EvaporationEvaporation The water vapors are held in the atmosphere, asThe water vapors are held in the atmosphere, as air cools, the vapors becomeair cools, the vapors become condensationcondensation (tiny(tiny droplets of water that form clouds)droplets of water that form clouds) When the droplets grow larger and get too heavy,When the droplets grow larger and get too heavy, they fall back to Earth asthey fall back to Earth as precipitation:precipitation: – rain, snow, hail, or sleet.rain, snow, hail, or sleet.
- 13. EvaporationEvaporation Water vapors in the air causes humidity.Water vapors in the air causes humidity. Humidity and temperature combined causesHumidity and temperature combined causes moving air masses, which results in weathermoving air masses, which results in weather front.front. – Cold Front – moving mass of cool airCold Front – moving mass of cool air – Warm Front – moving mass of warm airWarm Front – moving mass of warm air –
- 14. Evaporation and Air MovementEvaporation and Air Movement Let’s take a look at this process, click on the umbrella!!! Water vapors in the air cause humidity. Humidity andWater vapors in the air cause humidity. Humidity and temperature combined causes moving air masses, whichtemperature combined causes moving air masses, which results in weather fronts.results in weather fronts. A front refers to the “front or leading” edge of a movingA front refers to the “front or leading” edge of a moving air mass:air mass: Cold Front – leading edge of a mass of cool airCold Front – leading edge of a mass of cool air Warm Front – leading edge of a mass of warm airWarm Front – leading edge of a mass of warm air
- 15. HurricanesHurricanes Weather Fronts can lead to severe weather, suchWeather Fronts can lead to severe weather, such as Hurricanes.as Hurricanes. Hurricanes are large, violent tropical stormsHurricanes are large, violent tropical storms with wind speeds greater than 117km/hrwith wind speeds greater than 117km/hr Hurricanes begin as thunderstorms over warmHurricanes begin as thunderstorms over warm water, the heat from the water, wind, andwater, the heat from the water, wind, and moisture help fuel the storm.moisture help fuel the storm.
- 16. HurricanesHurricanes Hurricane winds move counterclockwise, whileHurricane winds move counterclockwise, while the eye of the storm (middle) remains calm.the eye of the storm (middle) remains calm. Let’s take a look at the movement of aLet’s take a look at the movement of a hurricane.hurricane. – http://www.teachertube.com/viewVideo.php?http://www.teachertube.com/viewVideo.php? title=Hurricane_Ike_by_3D_Weather_Globe&videotitle=Hurricane_Ike_by_3D_Weather_Globe&video _id=49703_id=49703
- 17. Lesson Recap:Lesson Recap: The Sun’s KeyThe Sun’s Key RolesRoles Effects on Earth’sEffects on Earth’s weatherweather Moving Air: TheMoving Air: The WindWind EvaporationEvaporation HurricanesHurricanes