Todays agenda 1.Peer Tutoring a. Post assessment Pressure, Air Pressure, Altitude, Density, Atmosphere, Weather) . B. Pre assessment Troposphere, Stratosphere, Mesosphere, Thermosphere, Ionosphere, Exosphere) 2. Notes taking from PowerPoint (Layers of the Atmosphere)
http://www.timeanddate.com/eclipse/lunar/2014-october-8 Q1. Why do we see the red color of the moon during Lunar Eclipse? A. All the light from the sun is blocked by the earth. The earth has an atmosphere. The light when escapes from Earths atmosphere bends and orange/red light bends the most.
The Atmosphere Q2. What are the properties of air? Ans. 1. Air has mass. 2. Air occupies space, or has volume. 3. Air has density. 4. Air exerts pressure.
Composition of the Atmosphere Nitrogen makes up 80% of our atmosphere Oxygen makes up 21% Argon makes up almost 1%
All other gases have only trace amounts Atmospheric Pressure The atmosphere exerts pressure on the Earth that decreases with increasing altitude This is due to the fact that with
increasing altitude, there is a decrease in the column of gases above the Earths surface At greater altitudes, the same volume contains fewer
molecules of the gases that make up the air. This means that the density of air decreases with increasing
altitude. Trace elements/compounds Carbon dioxide: plants use to produce food. Plants take in CO2 and give off oxygen as a waste product. Animals take in oxygen to make energy and give off CO2 as a waste product.
Fossil fuels (coal, oil, natural gas) give off CO2 when they are burned. Rising CO2 levels can cause global Water Vapor Water Vapor is water in the form of a gas. It is invisible, not the same thing as steam. Steam is water vapor
condensing back into a liquid. The amount of water vapor in the air varies, from 0% in an arid environment, to 5% in tropical rain forests. Ozone Ozone is a molecule of oxygen with 3 oxygen atoms instead of 2.
Often formed when lightning interacts with oxygen in the air. Forms a layer in the atmosphere that absorbs ultraviolet radiation from the sun. Without this layer life might not be possible on the surface of the planet. What is the atmosphere?
The layer of gases that surrounds our planet. Weather is the condition of the atmosphere at a certain place and time. Our atmosphere makes life possible on our planet. Provides us with oxygen. Keeps surface warm so water can exist as a liquid.
Protects the surface from dangerous radiation from the sun. Layers of Atmosphere video http:// studyjams.scholastic.com/studyjams/jams/ science/weather-and-climate/earths-atmos
phere.htm Why is the atmosphere divided into four layers? Temperature variations in the four layers are due to the way solar energy is absorbed as it moves downward through the atmosphere. The boundaries between each layer
are known as the pauses. The tropopause, stratopause, and mesopause mark the increase or decrease in temperature. Troposphere Troposphere Tropo means changing or turning As altitude increases, temperature
decreases. -60 degrees Celsius at the boundary of Troposphere. Stratosphere Strato means layer or spread out Has ozone ( three atom oxygen ) layer protects the earth from harmful UV radiation coming from the sun
As altitude increases the temperature increases Mesosphere Meso means middle Meteor showers happens in this layer As altitude increases the temperature decreases to 90 degrees Celsius
Thermosphere Thermo means heat Outermost layer which blends with outer space Very hot temperatures (1800 degrees Celsius ) Two layers of Thermosphere Lower layer Ionosphere
Auroras happens here Upper layer Exosphere Satellites are stationed here. The structure of the atmosphere based on
temperatur e differences . Note that the "pauses" are actually not lines, but are broad
5 Successfully passed the Diploma Level examination offered by the British Computing Society (BCS). 5 Successfully passed the Professional Graduate Level examination offered by the British Computing Society (BCS).
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