Moon
Phases of Moon
• New Moon: None of the Moon is visible from Earth
• Crescent Moon: Less than half full
• Half Moon: Half the moon is visible
1st Quarter Half - right side lit, 1/4 way through phases
3rd Quarter Half- left side lit, 3/4 way through phases
• Gibbous Moon: More than half full - less than full
• Full Moon: The whole Moon is visible
Waxing
•
•
Increasing in size
right side lit
Waning
•
•
Decreasing in size
left side lit
1st Quarter
Half Moon
waxing crescent
waxing gibbous
waxing
Full
waning
New Moon
waning gibbous
waning crescent
3rd Quarter
Half Moon
Moon Facts
• Half of the Moon is always lit. It is the half that
faces the Sun.
• We see the phases of the Moon because the Moon
orbits around us, changing how much of lit half we
see.
•
It takes approximately 29.5 days for the Moon to
completely revolve around the Earth.
1st Quarter
Half Moon
waxing gibbous
Day 7-8
waxing
Full
Day 14-15
waning
waxing crescent
Day 1
30
New Moon
waning gibbous
Day 21-22
3rd Quarter
Half Moon
waning crescent
axis
• an imaginary line that a
rotate
• to spin on an axis
revolve
• to move around a central
lunar
• relating to Moon
body rotates on
point
To figure out the phase:
• Step 1 - darken the shaded portion of the
Moon.
• Step 2 - Turn the paper so that the Moon
is facing up.
• Step 3 - Draw view lines from the Earth to
the Moon.
• Step 4 - Draw what you would see from
Earth (what side & how much is lit up??)
This is the moon from space looking down at the earth from _________________________
the North Pole.
Sun’s Rays
Half Moon - 1st Quarter
Waxing Gibbous
Waxing Crescent
Full
Moon
New
Moon
Waning Gibbous
Half Moon - 3rd Quarter
Waning Crescent
Why do we only see one
side of the moon?
• It takes the moon 29.5 days to revolve
around the Earth
• It takes the moon 29.5 days to make one
complete rotation on its axis
• One revolution = One rotation
• The Moon’s more dense side always faces
Earth so we only see one side of the Moon
_____________________________________
The Sun is not moving. The Earth turns, or rotates,
_____________________________________
from darkness into the light of the Sun. This is
_____________________________________
sunrise. At sunset, the Earth rotates away from the
Sun’s
_________________________________
light into darkness.
Sunrise
Sunset
Direction of Rotation
Go TO Notebook File - Moon Phase - Time of Day
How far apart are the
Moon & Earth?
30 Earth diameters apart
How big is the Moon
compared to the Earth?
Moon’s diameter is 30% of the
Earth’s diameter.
How was the Moon created?
• The Moon was created when a small
planet the size of Mars slammed into
Earth, shortly after the solar system
began forming about 4.5 billion years
ago.
• Evidence:
Earth’s large metal core
Moon moving away 1.5 inches/year
Made from same material as Earth
No water in rocks (basalt)
Earth Rotates
http://www.huffingtonpost.com/2012/03/15/moon-evolution-history-video-nasa_n_1347087.html?ref=science