How the moon affects earth.

1
How the moon affects earth.
2
Motions of the moon

• The moon rotates on its axis once every 27.3
  days.
• The moon revolves around the earth once every
  27.3 days.
• Therefore, a day and a year on the moon are
  the same length!
• The same side of the moon, the near side, always
  faces earth. We never see the far side of the
  moon.

3
Phases of the moon

• The different shapes of the moon that we see from
  earth are called its phases.
• Phases are caused by the position of the earth,
  moon and sun and those positions change every
  day.
• The phase of the moon we see depends on the
  amount of the sunlit side of the moon that faces
  earth.
• Moon phases-moon phases code cfp 5013

4
tides

• The rise and fall of oceans water every 12.5
  hours.
• Caused by the differences in how much the moons
  gravity pull on different parts of the earth.
• Spring tides- greatest difference in low and high
  tides. Occurs when sun, moon and earth are
  aligned in a straight line.
• Neap tides- least difference in low and high
  tides. Occurs when moon is at right angles to
  earth and sun.
• Animation http//www.sfgate.com/getoutside/1996/j
  un/tides.html

5
eclipses

• When the shadow hits Earth or moons Earths
  shadow hits the moon, an eclipse occurs.
• Eclipse-caused when an object in space comes
  between the sun and another objects, casting a
  shadow on that object.
• Solar eclipse- occurs at the new moon phase when
  the moon passes between Earth and the sun,
  blocking the sunlight from reaching Earth.
• Animation of solar eclipse
• http//www.teachersdomain.org/resources/ess05/sci/
  ess/eiu/totaleclipse/index.html
• Lunar eclipse- occurs at a full moon when Earth
  is directly between the moon and the sun.
• Animation of a lunar eclipse
• http//www.classzone.com/books/earth_science/terc/
  content/visualizations/es2504/es2504page01.cfm?cha
  pter_novisualization