7th Grade Chapter 5 Lesson 4

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7th Grade Chapter 5 Lesson 4

  1. 1. 7 th Grade Chapter 5 Lesson 4 Pgs. 178-183 For Student Use Only
  2. 2. The Motion of Air <ul><li>Wind- movement of air from one place to another in a horizontal motion. </li></ul><ul><li>Updraft, Current, and Downdraft- wind moving vertically </li></ul><ul><li>Wind- has kinetic energy </li></ul>
  3. 3. Energy <ul><li>Sun- source of all heating </li></ul><ul><li>Radiant Energy is converted into kinetic energy (to heat) </li></ul><ul><li>Earth and Water release heat energy </li></ul>
  4. 4. Energy <ul><li>Temperature Factor </li></ul><ul><ul><li>Winds= a direct result of the temperature differences that exist across the surface of the Earth </li></ul></ul><ul><ul><li>Different surfaces heat differently </li></ul></ul><ul><ul><ul><li>Some surfaces reflect light and some absorb light </li></ul></ul></ul><ul><ul><ul><li>Remember darker surfaces absorb more than lighter surfaces </li></ul></ul></ul><ul><ul><li>Different areas of the Earth heat differently </li></ul></ul><ul><ul><ul><li>The angle of the sun is more direct at different areas </li></ul></ul></ul>
  5. 5. Heat Energy <ul><li>Albedo- the percentage of radiation that is reflected </li></ul><ul><li>Color is determined by the amount of light that is reflected </li></ul><ul><ul><li>Black absorbs colors </li></ul></ul><ul><ul><li>White reflects all colors </li></ul></ul><ul><ul><li>Dark heats up more quickly than light </li></ul></ul>
  6. 6. Heat Energy <ul><li>Three differences between land and water </li></ul><ul><ul><li>1. Water is somewhat transparent but land is not </li></ul></ul><ul><ul><li>2. Land is a solid but water is a liquid </li></ul></ul><ul><ul><li>3. Water has a much greater heat capacity than land </li></ul></ul>
  7. 7. Difference between soil and water <ul><ul><li>1. Water is somewhat transparent but land is not </li></ul></ul><ul><ul><ul><li>Radiant energy heats water differently from soil </li></ul></ul></ul><ul><li>Movie Notes: </li></ul><ul><ul><li>A Look at How Land Heats up </li></ul></ul>
  8. 8. Difference between soil and water <ul><ul><li>2. Land is a solid but water is a liquid </li></ul></ul><ul><ul><ul><li>Molecules of solid do not move, but liquids do move and heat up quickly </li></ul></ul></ul><ul><ul><ul><li>Liquids create convection currents (warm fluids rise and cool fluids sink) </li></ul></ul></ul><ul><li>Movie Notes: </li></ul><ul><ul><li>Surface Wind and Convection Currents </li></ul></ul>
  9. 9. Difference between soil and water <ul><ul><li>3. Water has a much greater heat capacity than land </li></ul></ul><ul><ul><li>- Heat Capacity- a substance is the amount of energy needed to raise its temperature by one degree </li></ul></ul><ul><li>Movie Notes: </li></ul><ul><ul><li>Heat Capacity </li></ul></ul>
  10. 10. Heat Capacity <ul><li>These differences make different objects heat up differently </li></ul><ul><ul><li>It is important that water heat up slowly </li></ul></ul><ul><ul><ul><li>Our bodies are water </li></ul></ul></ul><ul><ul><ul><li>Our Earth is water </li></ul></ul></ul>

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