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Layers and density

Layers and density. http://science.howstuffworks.com/nature/climate-weather/atmospheric/weather3.htm. http://www.obspm.fr/actual/nouvelle/nov05/titan.en.shtml. Bolide falling to earth. Lake effect snow over the Great Lakes. II. The atmosphere .

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Layers and density

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  1. Layers and density http://science.howstuffworks.com/nature/climate-weather/atmospheric/weather3.htm http://www.obspm.fr/actual/nouvelle/nov05/titan.en.shtml

  2. Bolide falling to earth

  3. Lake effect snow over the Great Lakes

  4. II. The atmosphere • A. The atmosphere is the ocean of gases, held in by gravity, that surrounds our planet. It is a mixture of gases. • Page 14 of the ESRT has a graph of the characteristics that change with altitude. • Page 1 shows us that the lowest level, called the troposphere, is primarily nitrogen and oxygen. • Water vapor is found ALMOST only in the troposphere, which is where ‘weather’ occurs.

  5. III. The atmosphere • A. Using the page of the ESRT, notice the following: • the atmosphere is divided according to the way in which temperature CHANGES with altitude. • Atmospheric pressure steadily decreases with altitude. The greatest pressure is at sea level, due to the weight of overlying molecules. • Pressures are given as negative exponents. • Water vapor concentrations are greatest at sea level, and almost nonexistent above the tropopause.

  6. B. The levels of the atmosphere. • The troposphere has the greatest concentration of water vapor and the greatest pressure. • The stratosphere contains ozone, which absorbs ultraviolet (uv) rays, causing it to warm with increases in altitude. • Ozone is a form of oxygen, O3 very different than breathable oxygen,O2. • Ultraviolet light is a form of very powerful electromagnetic energy.

  7. Practice • What is the temperature range of each of the layers? • What is the altitude of the tropopause? • In what layer is the air pressure 10-3? • What is the pressure at sea level? • What is the temperature at a height of 25 miles? • What level controls incoming ultraviolet light? • Review Book: ch. 7 page 170-171 read.

  8. Classzone.com for weather for the atmosphere go to: http://www.classzone.com/books/earth_science/terc/content/investigations/es1702/es1702page01.cfm https://castlelearning.com/review/login/login.aspxfor atmosphere questions

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