Movements of the Moon

Movements of the Moon

Chapter 28 section 2

Objectives

•  Explain why ______occur.

•  Describe the appearance of ______phases of the moon.

Earth-Moon System

•  The Earth and our moon form a single ______that orbits the ______.

•  ______- the balance point of the Earth-moon system

The Moon’s Orbit

•  The moon orbits the Earth in an ______path.

•  ______- the point on the ellipse when the moon is closest to the Earth

•  ______- the point on the ellipse when the moon is farthest from the Earth

Moonrise & Moonset

•  The moon appears to rise and set on the horizon because of Earth’s ______.

•  The moon rises ______minutes later each night because of Earth’s ______and the moon’s ______.

Lunar Rotation

•  Because lunar rotation takes the same amount of time as revolution around the Earth (______), we always see ______

•  Depending on where the moon is in its orbital path, sometimes the near side is ______, sometimes it is ______.

Eclipses

•  ______- when one celestial body passes through the shadow of another

•  The shadows cast during an eclipse have 2 parts:

–  ______- inner cone shaped part of the shadow where light is completely blocked

–  ______- outer part of the shadow where light is only partially blocked

Solar Eclipses

•  Occur when the ______is between the ______and part of Earth; the shadow of the ______falls on Earth

•  ______- when the sun’s light is completely blocked by the moon (seen by those within the umbra)

•  ______- when the sun’s light is shaded by the moon (seen by those within the penumbra)

Solar Eclipses continued

•  ______seen by people in the umbra before the last bit of sunlight is obscured

Solar Eclipses continued

•  ______- ring shaped eclipse that occurs when the moon is at or near apogee, the umbra doesn’t reach the Earth

Lunar Eclipses

•  Occurs when the ______is between the ______& the ______; Earth’s shadow crosses the lighted portion of the moon

•  ______- the entire moon passes into the Earth’s umbra

•  ______- only part of the moon passes into the Earth’s umbra

•  ______- the moon passes through the Earth’s penumbra

Phases of the Moon

•  ______- varying shapes of the moon illuminated by reflected sunlight

•  ______- occurs when the moon is between the Earth and the sun, the far side is illuminated and the near side is dark

•  ______- the lighted portion of the moon is getting bigger

•  ______- the entire near side is illuminated

•  ______- the lighted portion is getting smaller

•  ______- less than ½

•  ______- more than ½

New Moon to New Moon

•  The moon orbits the Earth in ______days.

•  Time between successive new moons is ______days.

•  The 2.2 day difference is due to the ______of the Earth-Moon system around the ______.