Section 2 Notes

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Section 2 Notes

  1. 1. Section 2 Energy Transfer in the Atmosphere
  2. 2. Energy from the Sun <ul><li>Some energy from the Sun is reflected back into space, some is absorbed by the atmosphere, and some is absorbed by land and water on Earth’s surface. </li></ul>
  3. 3. Heat – energy that flows from an object with a higher temperature to one with a lower temperature <ul><li>Radiation – energy transferred in rays or waves </li></ul>
  4. 4. Heat <ul><li>Convection – transfer of heat by the flow of a material </li></ul><ul><ul><li>Molecules move closer together, making the air more dense, and the air pressure rises. </li></ul></ul><ul><ul><li>Cold air sinks, pushing up warm air, which then cools and sinks, pushing up more warm air. </li></ul></ul>
  5. 5. Heat <ul><li>Conduction – transfer of energy when molecules bump into each other through contact </li></ul>
  6. 6. The Water Cycle <ul><li>Water moves back and forth between Earth’s atmosphere and surface </li></ul>
  7. 8. The Water Cycle <ul><li>Energy from the Sun causes water to evaporate from the hydrosphere, and rise as a vapor. </li></ul><ul><li>Water vapor in the atmosphere can cool and return to liquid to form through condensation. </li></ul><ul><ul><li>When water vapor condenses, clouds of tiny water droplets may form. </li></ul></ul><ul><ul><li>Water droplets collide to form larger drops. </li></ul></ul><ul><ul><li>As water drops grow, they fall back to Earth as precipitation. </li></ul></ul>
  8. 10. Earth’s Atmosphere is Unique <ul><li>It hold just the right amount of the Sun’s energy to support life. </li></ul><ul><li>Mars – a cold and lifeless planet </li></ul><ul><ul><li>The atmosphere is too thin to support life or to hold the Sun’s heat. </li></ul></ul><ul><ul><li>Temperatures range from 35°C to -170°C </li></ul></ul><ul><li>Venus – a dense and hot </li></ul><ul><ul><li>The dense atmosphere traps heat from the Sun. </li></ul></ul><ul><ul><li>The temperature at Venus’ surface is 470°C. </li></ul></ul>
  9. 11. Romans 1:20 <ul><li>For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse. </li></ul>

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