3 Astronomy: Earth's Moon

The age of the moon is about...

• 4.5 billion years old

• 3.5 billion years old

• 2.5 billion years old

• 5.5 billion years old

Based on the picture, what term(s) applies?

• new moon phase

• syzygy

• conjunction

• alignment of Earth-Moon-Sun

• All terms apply

How much of the Moon is always in the sunlight (if there is no lunar eclipse):

• half

• all

• none

• one-quarter

• it changes

About how long does it take the moon to make one complete cycle (orbit) around the earth?

• 65 days (about 2 months)

• 8 days (just over 1 week)

• 365 days (a calendar year)

• 27.3 days viewed from the stars (about 1 month)

Viewed from the Stars: the Moon makes a complete revolution once every ____ .

• 27.3 days

• 30 days

• 24 hours

• 27.3 hours

• 29.5 days

Which phase is this?

• Full

• New

• Waxing Crescent

• First Quarter

• Third Quarter

Name the phase of the Moon for letter f.

• First Quarter

• Last Quarter

• Waxing Gibbous

• Waning Gibbous

As Moon moves around the earth, both bodies orbit around a point in the middle called ________ and is located ________.

• midpoint; in the exact middle of the Earth-Moon

• barycenter; about 1000 miles within the Earth on the side where the Moon is located

• center point; at the exact center of the Earth

• center of gravity; at the exact middle between the Earth-Moon

When does the full Moon rise?

• sunrise

• sunset

• midnight

• noon

When does the third quarter moon rise?

• sunrise

• sunset

• midnight

• noon