8th Grade Chapter 1 Lesson 7


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8th Grade Chapter 1 Lesson 7

  1. 1. 8 th Grade Chapter 1 Lesson 7 Pgs. 50-57 For Student Use Only
  2. 2. Earth and the Moon <ul><li>Earth: </li></ul><ul><ul><li>The only planet that is suitable for life </li></ul></ul><ul><ul><li>Positioned for right amount of light and heat </li></ul></ul><ul><ul><li>Perfect atmosphere for maintaining life: </li></ul></ul><ul><ul><ul><li>Mostly Nitrogen with 20% oxygen </li></ul></ul></ul><ul><ul><ul><li>Ozone layer (O 3 ) protects us from the harmful rays of the sun </li></ul></ul></ul>
  3. 3. Earth and the Moon <ul><li>Earth: </li></ul><ul><ul><li>Plenty of water (70% of Earth’s surface is covered in water) </li></ul></ul><ul><ul><li>It is important that we protect and are good stewards of the world that was created for us, but there are also many “checks and balances” to keep the earth moving. </li></ul></ul><ul><ul><ul><li>For example: Watch water usage, not polluting, etc. </li></ul></ul></ul>
  4. 4. Earth and the Moon <ul><li>The Moon </li></ul><ul><ul><li>Our largest Satellite </li></ul></ul><ul><ul><ul><li>Satellite- an object that revolves around another object </li></ul></ul></ul><ul><ul><li>Reflects light from the sun </li></ul></ul><ul><ul><li>Full of craters- (holes) </li></ul></ul><ul><ul><li>Full of Marias- (seas)- these are seas of rock and are not as smooth as the look from Earth </li></ul></ul>
  5. 5. Earth and the Moon <ul><li>Moon </li></ul><ul><ul><li>Has Rilles- (crevices or trenches) </li></ul></ul><ul><ul><li>Had Mountain Ranges- these are huge and some are bigger than Mt. Everest </li></ul></ul>
  6. 6. Earth and the Moon <ul><li>Moon Phases </li></ul><ul><ul><li>The moon revolves around Earth every 29 days, 12 hours and 44 minutes. This is a lunar month . </li></ul></ul><ul><ul><li>The same side of the moon faces the earth at all times. </li></ul></ul><ul><ul><li>Moon appears to change size and shape because different parts of the moon reflect or are hidden from the sun as the earth moves around the earth. </li></ul></ul>
  7. 7. Earth and the Moon <ul><li>Moon Phases </li></ul><ul><ul><li>The moon waxes- gets bigger </li></ul></ul><ul><ul><li>The moon wanes- gets smaller </li></ul></ul><ul><ul><ul><li>New Moon- when lit side of the moon is away from Earth </li></ul></ul></ul><ul><ul><ul><li>Crescent Moon- think finger nail moon </li></ul></ul></ul><ul><ul><ul><li>Quarter Moon- half moon </li></ul></ul></ul><ul><ul><ul><li>Gibbous- bulging or bowl moon </li></ul></ul></ul><ul><ul><ul><li>Full Moon- when we can see the entire lit face of the moon </li></ul></ul></ul>
  8. 8. Earth and the Moon <ul><li>Moon </li></ul><ul><ul><li>Special Moon Events </li></ul></ul><ul><ul><ul><li>Solar Eclipse: When moon blocks sun from Earth (only seen on a small portion of Earth’s surface) </li></ul></ul></ul><ul><ul><ul><li>Lunar Eclipse: When the moon is full and the earth blocks the suns rays from reflecting off the moon. </li></ul></ul></ul>
  9. 9. Earth and the Moon <ul><li>Moon </li></ul><ul><ul><li>Moon’s gravitational pull creates tides: </li></ul></ul><ul><ul><ul><li>High tide- the water moves up the shore to its highest point </li></ul></ul></ul><ul><ul><ul><li>Low tide- the water moves down the shore to its lowest point </li></ul></ul></ul><ul><ul><ul><li>Spring tides: Happen at full and new moon, sun combines with moon to create extra high or extra low tides </li></ul></ul></ul><ul><ul><ul><li>Neap tides: Happen at first-quarter and third-quarter moons, sun and moon work against each other (opposite angles) and tides are weaker </li></ul></ul></ul>