Get Started Take out Notebooks/ 3-ring binder How much of each gas do you think is in the atmosphere? (Oxygen, Nitrogen, Carbon Dioxide, Methane) What could happen if instead of a mixture of gaseous compounds, air were only pure oxygen? Why do we need those other compounds in the air?

Agenda Atmosphere Quick Notes Air Quality Data Analysis Point of View about the air Summary/ Feedback/ Questions

Atmosphere

Atmosphere Mixture of gases air Atmospheric gases (now) Percentage (%) by volume Nitrogen 78.08 Oxygen 20.95 Argon 0.93 Carbon Dioxide 0.03 Water vapor, ozone, and other gases 0.01

Graph

Composition of the atomsphere Early atmosphere : More carbon dioxide and methane Now: More oxygen Photosynthesis

Atmosphere Greenhouse effect sustains life Ozone layer filters UV Maintains life oxygen / carbon dioxide Weather water cycle

Layers of the atmoshere https://www.youtube.com/watch?v=WaikvaAw2nk

Layers Exosphere 600- 10.000 km Hydrogen and helium - Less gas particles Meteorological satellites Thermosphere 80-600 km 1500ºC -Ionosphere Layer Mesosphere 50-80 km No water vapor or ozone -100ºC Lowest temperatures Stratosphere 15- 50 km Almost no water vapor -Ozone -Ozone layer 30 km altitude Troposphere 0- 15 km -Oxygen -Carbon dioxide -nitrogen Water vapor 75% atmosheric mass Area we live in Changes in weather

Ozone Layer https://www.youtube.com/watch?v=1b3-l4BxqGA

but why isn’t this heat gone when the rays of light are gone at night? Question The sun heats our planet….. but why isn’t this heat gone when the rays of light are gone at night?

Agenda Global Warming Quick Notes Gist Summary Group readings/ Extra Quotes S.O.S. Summary Debate Action Plan Writing Summary/ Feedback/ Questions

Greenhouse effect Caused by : Water vapor Carbon dioxide Methane Function: retain the heat from the sun: average :15ºC liquid water sustains life

Global Warming We add to the gases when we use factories, cars, raise cattle for meat eaters, etc. When there are too many greenhouse gases, too much heat remains on the planet Climate is affected and weather events become more severe, along with other side effects AVOID THE MYTHS, KNOW YOUR FACTS: *Climate is not weather. It is averaged compared to previous history. You cannot see it in the daily weather *The term warming does not mean that temperatures go up, and that is it. It is better to think of it as “global weirding”

Gist Summary What is today’s focus? Who is responsible for the event? What are some effects? 20 word summary:

S.O.S Summary Read your quotes or information What statement are these people trying to make/ what is their point of view about global warming? List at least 3 pieces of evidence you can pull from your text sources Come together with the rest of your debate team to share ideas and come up with one main argument to use and support

Action Plan Writing Today we will free write… Paragraph One: What did your side of the argument say and what was their support? Paragraph Two: What did the other side of the argument say and what was their support? Paragraph Three: What is your own opinion of the argument and what should happen next? Who should do what to make a difference? Why would that be helpful?

Video https://www.youtube.com/watch?v=BRczqAFIjoM

Air Quality

Air Quality Data

Point of View There aren't too many positives to be found in air pollution. It's unhealthy, unsightly and damaging to the planet that we hope to spend a lot more time on. But could it be that there's actually an upside here? Might the sky-blocking phenomenon known as smog actually enhance sunsets?

Be it the azure of high noon or the orange glow of dusk, the colors of the sky result from sunlight interacting with molecules in the air, primarily nitrogen and oxygen, which cause it to be deflected in all directions, a phenomenon called Rayleigh scattering. Remember how the molecules in the atmosphere are scattering blue and violet more than the longer wavelengths of yellow, orange and red? This same Rayleigh scattering turns the sky from blue to combinations of red, orange and yellow as the distance between the sun and your eye increases, because the light has to travel through more of the atmosphere. As light travels through the atmosphere, hitting those molecules along the way, more and more of the shorter wavelengths are scattered. By the time the light reaches your eye, all the blue and violet has been scattered out, leaving only the longer wavelengths in the sky for you to see. That's why a setting sun turns the sky red, orange, yellow and all shades in between. All of that scattered blue and violet is busy creating a blue daytime sky somewhere else in a different time zone.

Last Items/ Questions Summary: Abiotic Earth Materials: Rocks, Minerals, Soil, Water, Temperature, Light, Gases/Air HW: Catch-up on Unit Project Packet Research global warming for tomorrow Mini Quiz Wednesday Bring in water samples for Thursday Claim & Topic Sentences due Friday