Earth, Sun, and Moon

1
Earth, Sun, and Moon

• Carin Miranda
• Smyrna Middle
• Spring 2010

2
Days and Night

• The celestial body around which Earth rotates and
  revolves is the SUN
• The time required for Earth to rotate once on its
  axis is called a day.
• Earths rotation is a direct cause of daylight
  and night.

3
Seasons

• Seasons are caused mainly by the 23.5 degree tilt
  of Earths axis.
• December 22 marks the beginning of winter in the
  Northern Hemisphere.
• Winter in the Southern hemisphere is caused by
  the South Pole tilting away from the sun.

4
Seasons
5
Phases of the Moon

• Phases are the different appearances of the moon
  due to its changing position.
• Caused by the relative positions of the moon,
  Earth, and the sun.
• When the sunlight part of the moon we see from
  Earth appears to get larger it is called waxing.
• When the sunlight part of the moon we see from
  Earth appears to get smaller it is waning.

6
Eclipses

• Eclipses are when the shadow of one celestial
  body falls on another.
• Doesn't happen every month because the moons
  orbit is tilted.

7
Solar Eclipses

• During a total solar eclipse the moon appears to
  fully cover the disk of the sun.
• Happens when the moon is between the Earth and
  the sun.

8
Lunar Eclipses
9
Solar Eclipse
10
Tides

• The force that pulls tides is gravity.
• The main source of gravity for tides is the moon.
• High tide is the bulge that takes place on parts
  of the Earth facing or opposite the moon.

11
Neap Tide

• When the Earth, moon, and sun form a ninety
  degree angle.

12
Spring Tide

• When the Earth, moon, and sun form a straight
  line.