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Ss Chapter 19.1


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Ss Chapter 19.1

  1. 1. Chapter 19 Earth Cycles and Processes GEE Science Summer Remediation Mr. Nash Donnie Bickham Middle School Room 204
  2. 2. Earth Recycles the Elements <ul><li>Earth recycles atoms and compounds over and over in a closed system. </li></ul><ul><li>Closed system is composed of four parts: </li></ul><ul><ul><li>Atmosphere </li></ul></ul><ul><ul><li>Hydrosphere </li></ul></ul><ul><ul><li>Biosphere </li></ul></ul><ul><ul><li>Lithosphere </li></ul></ul>Pg. 324
  3. 3. Earth Recycles the Elements <ul><li>All four spheres depend on each other and interact closely. </li></ul><ul><li>Changes in the rates of recycling in one of the four parts affects each sphere. </li></ul><ul><li>If each sphere operates naturally, the health of each is maintained. </li></ul>Pg. 324
  4. 4. Earth Recycles the Elements <ul><li>If a pollutant is introduced into one sphere, all other areas will be affected as well. </li></ul><ul><li>Pollutants can be naturally occurring like the debris from a volcano or an increase in salt content because of evaporation. </li></ul><ul><li>Pollution is also the result of human activities. </li></ul>Pg. 324
  5. 5. Atmosphere <ul><li>Mixture of gases surrounding the earth. </li></ul><ul><li>Believed that this mixture has changed as earth has evolved. </li></ul><ul><li>Heat from the surface warms air close to the earth, causing air to rise. </li></ul><ul><li>Cooler air rushes in to fill the empty area creating wind. </li></ul>Pg. 325
  6. 6. Atmosphere <ul><li>Winds accelerate the evaporation of water. </li></ul><ul><li>Winds can move atmospheric gases as well as small solid particles from one place to another. </li></ul>Pg. 325
  7. 7. Hydrosphere <ul><li>The hydrosphere is all water environments of earth. </li></ul><ul><li>This includes oceans and all water situated on the land surface and below ground. </li></ul><ul><li>As water flows it moves large volumes of minerals. </li></ul>Pg. 325
  8. 8. Hydrosphere <ul><li>Often rock and sediment are transported thousands of miles. </li></ul><ul><li>Where the atmosphere and the hydrosphere meet, gases in each sphere transfer to the other if conditions are right. </li></ul>Pg. 325
  9. 9. The Water Cycle <ul><li>Circulates freshwater between the atmosphere and the earth. </li></ul><ul><li>95 % of all water on earth is salt water. </li></ul><ul><ul><li>Most freshwater is in the form of glaciers. </li></ul></ul><ul><li>Freshwater is vital for carrying out metabolic processes and is replenished by the water cycle. </li></ul>Pg. 325
  10. 10. The Water Cycle <ul><li>Precipitation in the form of rain, ice, snow, hail, or dew falls to the earth and ends up in lakes rivers, and oceans through the precipitation itself or through runoff. </li></ul><ul><li>Evaporation occurs from bodies of water sending water vapor into the atmosphere. </li></ul>Pg. 325
  11. 11. The Water Cycle <ul><li>Respiration from humans and animals and transpiration from plants also send water vapor into the atmosphere. </li></ul><ul><li>The water vapor cools to form clouds. The clouds cool and become saturated to form precipitation again. </li></ul>Pg. 325
  12. 12. The Water Cycle <ul><li>Without the water cycle of evaporation, precipitation, and runoff, a freshwater supply would not be available. </li></ul>Pg. 325