8th Grade Chapter 2 Lesson 4

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8th Grade Chapter 2 Lesson 4

  1. 1. 8 th Grade Chapter 2 Lesson 4 Pgs. 79-84 For Student Use Only
  2. 2. Ecliptic and Climates <ul><li>The sun follows the ecliptic path due to the Earth’s move. </li></ul><ul><ul><li>Equinox= where the ecliptic sun crosses the celestial equator (2 points) </li></ul></ul><ul><ul><ul><li>Vernal Equinox- In the Spring (March) </li></ul></ul></ul><ul><ul><ul><li>Autumnal Equinox- In the Autumn (between Summer and Winter) </li></ul></ul></ul>
  3. 3. Ecliptic and Climates <ul><li>Solstices: </li></ul><ul><ul><li>Solstice: a point on the ecliptic midway between the two equinoxes </li></ul></ul><ul><ul><ul><li>Summer Solstice- the sun is 23 ½ degrees North of the celestial equator. </li></ul></ul></ul><ul><ul><ul><li>Winter Solstice- the sun is 23 ½ degrees south of the celestial equator </li></ul></ul></ul>
  4. 4. Ecliptic and Climates <ul><li>Climate Zones </li></ul><ul><ul><li>Torrid Zone: scorched zone- bounded on the North by the Tropic of Cancer and on the South by the Tropic of Capricorn </li></ul></ul><ul><ul><li>Frigid Zones: experience one day of complete darkness and complete daylight bounded by Artic Circle and Antarctic Circle </li></ul></ul>
  5. 5. Ecliptic and Climates <ul><li>Climatic Zones </li></ul><ul><ul><li>Temperate Zones: Neither very hot or very cold, but sun is never straight overhead </li></ul></ul><ul><ul><li>Our Earth Wobbles: </li></ul></ul><ul><ul><ul><li>The wobbling of the Earth is called precession of the equinox. The earth’s axis would take 26,000 years to complete wobble. </li></ul></ul></ul>
  6. 6. Ecliptic and Climates <ul><li>Seasons: </li></ul><ul><ul><li>Tilt of the Earth causes seasons </li></ul></ul><ul><ul><ul><li>Kepler- 2 nd law of planetary motion says planets travel in elliptic orbits. Closer to the sun we travel faster. </li></ul></ul></ul><ul><ul><ul><li>The Northern Hemisphere and Southern Hemisphere have opposite seasons. </li></ul></ul></ul>
  7. 7. Ecliptic and Climates <ul><li>Seasons </li></ul><ul><ul><li>The sun can heat the Earth (Northern Hemisphere) better in July instead of in December </li></ul></ul><ul><ul><ul><li>Summer more direct sunlight hits the earth </li></ul></ul></ul><ul><ul><ul><li>Winter the sun is less direct </li></ul></ul></ul>
  8. 8. Ecliptic and Climates <ul><li>Making the months: </li></ul><ul><ul><li>The month: </li></ul></ul><ul><ul><ul><li>This is based on time between new moon and new moon. </li></ul></ul></ul><ul><ul><ul><li>The Gregorian calendar is the system we now use. </li></ul></ul></ul>
  9. 9. Ecliptic and Climates <ul><li>Calendars: </li></ul><ul><ul><li>Pope Gregory XIII established the new calendar; that we currently use. </li></ul></ul><ul><ul><li>Hindus, Arabs, and Hebrews all have their own calendars. </li></ul></ul>
  10. 10. Ecliptic and Climates <ul><li>Time: </li></ul><ul><ul><li>Calendars: </li></ul></ul><ul><ul><ul><li>Year- time it takes for the earth to revolve around the sun </li></ul></ul></ul><ul><ul><ul><ul><li>Years have been divided into BC and AD </li></ul></ul></ul></ul><ul><ul><ul><li>Week- not based on a heavenly body </li></ul></ul></ul><ul><ul><ul><ul><li>God used the week in Creation, people need the day of rest. </li></ul></ul></ul></ul>

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