Weather BellRinger What do you know about Atmosphere and Weather?
Atmosphere and Weather Composition and Layers of the Atmosphere
Why do airliners (airplanes) and some helicopters have oxygen masks on board? https://www.youtube.com/watch?v=aSZy9sbAXsk
Defining Atmosphere • The very thin layer of air formed around our planet Earth. • Acts as a protective covering • Without it days would be very hot and nights very cold • Acts in balancing heat transfer absorbing on Earth and going back to outer space • Atmosphere protects against harmful sun rays (Ozone layer) • The atmosphere makes life on Earth possible.
Atmosphere is Made Of • Gases, Solids, and Liquids • Goes from the surface of the Earth to outer space • Oxygen is produced by plants, and other organisms released into the atmosphere
Gases in the Atmosphere • The 1% other gases are made of the following: • .93% argon (new windows in homes energy efficient block sun rays keeps from heating the home – yet for passive solar…..) • .03% carbon dioxide • TRACES OF • Neon • Helium • Methane • Krypton • Xenon • Hydrogen • Ozone • Graph courtesy of • http://regentsprep.org/Regents/biology/units/laboratory/organization.cfm
Solids and Liquids in Earth’s Atmosphere • Solid particles • Dust (sand dirt particles blown by wind) • Salt (blown off the ocean waters) • Pollen (given off by plants) • Liquid particles • Tiny water droplets blown around These travel very far within the atmosphere to different regions. (Note- coral reef off coast of Florida keys is being damaged by particles from activity in Africa)
Layers of the Atmosphere • Includes the Surface of the Earth to Outer Space • Different temperatures and pressures • Each layer has their own properties
FIVE LAYERS 5.)Exosphere 4.)Thermosphere 3.)Mesosphere 2.)Stratosphere 1.)Troposphere
Atmospheric Conditions • The link below is a YouTube video of the world record free fall jump from the stratosphere. • http://www.youtube.com/watch?v=g4nJF9JFleI • The link to a fact sheet of Felix Baumgartner’s historic free fall jump. • http://www.runridedive.com/felix-baumgartner-freefall-facts-released/
Atmosphere Matching • Identify the layers of the atmosphere • Match the atmosphere layer with its description • Place the layers in order • After we go over the cards, write down the descriptions for each layer.
Troposphere (Lower Level of the Atmosphere) • Rain, snow, sleet, and hail occurs in it • We live in the troposphere • It contains 99% of the water vapor and 75% of the gases in the atmosphere • Air pressure is greatest at lower altitudes due to gravity pulling molecules and gases toward the Earth. • Air density is greatest at the surface due to this • Higher altitudes lower density of air molecules
Stratosphere • The layer above the troposphere, where the ozone layer is contained • The stratosphere is cold except in its upper region where ozone is located (the temperature rises as you move upward )
Mesosphere • the layer above the stratosphere, where meteors burn up, the temperature decreases as you rise • the mesosphere is the coldest layer
Thermosphere • the layer above the mesosphere • temperature increases as you rise
Ionosphere • part of the thermosphere, auroras(displays of light in the night sky) are found in this layer • Contains electrically charged gas particles
Exosphere • outermost layer of the atmosphere, where satellites and space shuttles orbit, • the cold regions of outer space extend from the exosphere)
Air pressure • the force exerted by the gases pushing on an object • It isgreatest near the surface of Earth, in the troposphere. • Air pressure decreases through the layers farther out from the surface as Earth’s pull of gravity decreases.
Air Pressure Change with Altitude Question? If pressure changes how does that affect an altimeter in an airplane? Pressure given inches of mercury Hg in aviation.
Temperature and Atmospheric Layers Notice the trend line in the graph of temperature change in the troposphere Also notice the different trend of temperature in different layers of the atmosphere. Courtesy of: http://www.skepticalscience.com//pics/2_atmosphere.jpg