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Chapter 6 Notes The Sun-Earth-Moon System

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Chapter 6 Notes The Sun-Earth-Moon System Section 1 Earth s Motion Astronomy- the study of the moon, stars, and other objects in space. Axis- the imaginary line ... – PowerPoint PPT presentation

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Title: Chapter 6 Notes The Sun-Earth-Moon System


1
Chapter 6 Notes The Sun-Earth-Moon System
2
Section 1 Earths Motion
  • Astronomy- the study of the moon, stars, and
    other objects in space.
  • Axis- the imaginary line that passes through
    Earths center and the North and South poles.
  • The tilt of the earths axis is 23.5 degrees
  • The Earths axis always points in the same
    direction.

3
  • Rotation- the spinning of the earth on its axis.
  • The earth rotates on its axis one time in a 24
    hour span (DAY)
  • The earths rotation on its axis causes night and
    day.
  • (see rotation pictures)

4
  • Revolution- the movement of an object around
    another object (YEAR)
  • It takes the earth 365.25 days to make one
    revolution around the sun.

5
  • Orbit- the earths path as it travels around the
    sun.
  • Earth has seasons because its axis is tilted as
    it moves around the sun
  • When the northern hemisphere points towards the
    sun, we will experience summer.
  • When the southern hemisphere points towards the
    sun, we will experience winter.

6
  • Solstice- Either the northern or southern
    hemisphere is pointing towards the sun
  • Equinox- Neither end of the Earths axis is
    tilted towards the sun (equal day and night)

7
Section 2 Phases, Eclipses, and Tides
  • The moon makes one rotation in 27.3 days (DAY)
  • The moon makes one revolution in 27.3 days
    (YEAR)
  • The moons day and year are the same.
    Because of this, we see the same side of the moon
    all the time.

8
  • The phases of the moon depend on how much of the
    lighted side of the moon can be seen from Earth.
  • When the moons shadow hits Earth or Earths
    shadow hits the moon, an eclipse occurs.

9
  • Lunar Eclipse- SUN-EARTH-MOON
  • Only occur during full moon
  • Solar Eclipse- SUN-MOON-EARTH
  • Only occur during new moon.

10
  • Tides- The force of gravity between the earth and
    moon and between the sun and moon affecting our
    oceans and causing high and low tides.
  • Spring Tide- sun and moon are in line
  • Neap Tide- Sun and moon are at a right angle to
    the earth (see pictures)

11
  • Phases of the Moon
  • 1. New Moon
  • 2. Waxing Crescent
  • 3. First Quarter
  • 4. Waxing Gibbous
  • 5. Full Moon
  • 6. Waning Gibbous
  • 7. Third Quarter
  • 8. Waning Crescent
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