Topic: The Moon
The Moon
The Earth’s only natural
satellite
A satellite is a body
that revolves in a
regular orbit around a
planet
Moon at Perigee
(closest to Earth)—
221,000 mi
Moon at Apogee
(furthest from
Earth)—253,000 mi
How would the Moon look when it is Closer to the Earth
compared to when it is Further away?
The Moon appears to change in size depending on where it’s located on
its orbit. This is called ______________.
Moon at Perigee
(closest to Earth)—
221,000 mi
Moon at Apogee
(furthest from
Earth)—253,000 mi
As the Moon gets closer to the Earth the Apparent Diameter
_________ and as the Moon moves further away Apparent
Diameter ___________.
2,200 mi
¼ size of the Earth
• No Atmosphere
– --– ---
Moon’s Rotation
ESRT pg 15
Moon’s Revolution around Earth
ESRT pg 15
Moon’s rotation period = ___________
The same side faces the Earth
We, on Earth, NEVER see the far side of the
Moon from Earth
•Synodic period (based on Sun) = 29.53 days
(about 1 month).
Fixed direction in space
29.53 days
Earth
Moon
Earth orbits around Sun =>
Direction toward Sun changes!
FQ:
Why does only one side of the Moon always face
Earth?
http://www.polleverywhere.com/multiple_choice_
polls/LTc1MzE0NTgy/web
Topic: Phases of the Moon
Phases of the Moon caused by:
_________________________________, Moon and Sun—as the
Moon revolves around the Earth
• Moon completes phases in 29 ½ days
Phases of the Moon:
Caused by the Moon’s revolution around Earth
Like the Earth, half of the Moon is always
lit by the Sun.
• Also like the Earth, half of the moon is completely dark.
• The moon does not really change, it ____________________
You have to ____ the car
before it _____
• As the Moon becomes more
illuminated, it is called a ______
• As the Moon becomes darker,
after the full Moon phase, it is
called a __________
New Moon
• When the Moon is in
between the Sun and
the Earth, we cannot
see the Moon. This
part of the Moon is in
the shade.
• This is called a
_______
Full Moon
• When the Earth is in
between the Moon
and the Sun, we see
the whole part of the
Moon which is lit up
by the Sun.
• This is called a
_______
Quarter Moon
• When the Moon is
above or below the
Earth, we can only
see half of the lit area
of the Moon.
• This is called a
_________
Crescent Moon
• When the Moon is in
between the new
moon and the quarter
moon, we are only
able to see a little
sliver of the
illuminated side of the
Moon.
• This is called a
__________
Earth Shine
____________
Moon Simulation
• http://www.eram.k12.ny.us/education/com
ponents/docmgr/default.php?sectiondetaili
d=17500&fileitem=4942&catfilter=452
Moon and Earth as viewed from space (top view)
As seen from Earth
Final Question
• Which phase of the
Moon is seen from
Earth when the Moon
is in Position 5?
• http://www.pollevery
where.com/multiple_
choice_polls/MTAxMj
Y0NjQ1Mw/web