PPT-Section 1.1 Earth’s atmosphere supports life

How does the atmosphere support life The atmosphere allows us to breathe Many different types of organisms need oxygen to perform life processes Plants require carbon dioxide to undergo photosynthesis . Earths atmosphere changes con stantly as these gases are added and removed For example ani mals remove oxygen when they breathe in and add carbon dioxide when they breathe out Plants take in carbon dioxide and add oxygen to the atmosphere when they Sunrise . from space over the South China Sea. An astronaut would see something like this; clearly defined bands of color through the atmosphere as the sun rises. High-peaking cumulus clouds, topping out in anvil-head cirrus can be seen as black shadows against the sunlit horizon. The brightness of the colors in the atmosphere in this photograph is due to the amount of dust in the atmosphere. More dust is found in near the equator. There are various sources for such upper level dust. Many dust storms in Africa and ash clouds from major volcanic eruptions are two reasons. . Chemical conditions of the early Earth. . A model for the first cells. First life. Life changes the planet: oxygenating Earth’s oceans and atmosphere. Eukaryotic cells descended from prokaryotic cells. Definition of the Atmosphere. . The layer of gases surrounding Earth; composed mainly of 78% nitrogen and 21% oxygen, and other gases (water vapor, dust, pollutants, etc.). Brainpop: . Earth’s atmosphere. And its effects on our planet Earth. What is the Atmosphere. ?. The . envelope of gases surrounding the earth or another planet. .. Earth’s atmosphere consists of 5 major layers. Troposphere. Stratosphere. and the Impact on Living Things. Earth’s Atmosphere. The gases that surround Earth (and other planets) make up the atmosphere. These gases are like an envelope that protects us from the radiation that is caused by the sun’s . Uda. : Global . Warming. A. ATMOSPHERE: . a . layer. of . gases. . sorrounding. a material body of . sufficient. mass . that. . is. . held. in . place. by the . gravity. of the mass.. ALTERATION: . Learning Target:. What is necessary for life to be present in our solar system?. Science Starter:. Pg. 2 Life on Earth Workbook…Answer question 1. Supplies: Life on Earth Workbook. 1. Heartbeat. 2. Return Papers. Michael Campbell, Colton Colwell, Jamie Easton, Anna Scarbrough. Cassini-Huygens Mission. Previous Mission. Cassini. Flyby. Huygens: Landed on Titan. Descended through atmosphere and landed on surface.. 8. th. Grade Earth and Space Science. Class Notes. Atmosphere Basics. Combination of gases, dust, water droplets, and ice crystals. Surrounds the Earth. Extends from the Earth’s . . surface to outer space. Non-living synthesis of simple . organic. molecules. All of the elements found in organic compounds are thought to have existed on Earth and in the rest of the solar system when the Earth formed. . But . . The layer of gases surrounding Earth; composed mainly of 78% nitrogen and 21% oxygen, and other gases (water vapor, dust, pollutants, etc.). Brainpop: . Earth’s atmosphere. Layers of the Atmosphere. “This most excellent canopy, the air” – fades with height while the airless Moon has an abrupt edge. Without the proper mix of gases in air, we would perish in seconds.. AIR CHEMISTRY. http://spaceflight.nasa.gov/gallery/images/shuttle/sts-100/hires/s100e5498.jpg. c.. 70 km (. c.. 43 mi), characterized by a relatively constant composition of its component gases. Air above a region of surface high pressure is more dense than air above . a region of surface low pressure (at the same temperature). .