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

Fixed direction in space

Earth

Moon

Earth orbits around Sun => Direction toward Sun changes!

29.53 days

•Synodic period (based on Sun) = 29.53 days

(about 1 month).

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/components/docmgr/default.php?sectiondetailid=17500&fileitem=4942&catfilter=452

As seen from Earth

Moon and Earth as viewed from space (top view)

Final Question

• Which phase of the Moon is seen from Earth when the Moon is in Position 5?

• http://www.polleverywhere.com/multiple_choice_polls/MTAxMjY0NjQ1Mw/web