arny, 3 rd edition, chapter 1. 22 you see it almost every day moon’s appearance moon’s changing...
TRANSCRIPT
Arny, 3rd Edition, Chapter 1
22
You see it almost every day
Moon’s appearanceMoon’s changing
phases What can we
observe about the Moon today that prehistoric people would also have seen?
33
Describe the reason we see the Moon go through phases.
Define and summarize the Moon’s cycle of phases
Why does the Moon look different every day?
Analyze how the Moon’s relationship to its phases relates to phenomenon on Earth
How does the Moon affect the Earth?
44
The Moon—Earth’s satellite and nearest neighbor
About 237,500 mi away380,000 kmA quarter of a million miles
Earth
Moon
Baseball
Marble
5.6 mor 18 ft
Earth
Moon
55
The Moon’s changing appearance—obvious to any observer
Based on relative positions of the Sun, Earth, and Moon
Appearance changes through a cycle over about one month.“Month” comes from the word “moon.”
66
What the Moon looks like at night “Rising” in the east and “setting” in the west;
rises 50 minutes later each day
Half the Moon is always lit by the Sun
Full Moon always rises as the Sun sets
Vocabulary Crescent
Gibbous
Waxing
Waning
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(A) The cycle of the Moon’s phases from new to full and back again. (B) The Moon's phases—pictures in the dark squares show how the Moon looks to us on Earth.
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How the Sun lights the Moon’s surface
When you can see a full Moon (position 5)
Phases about 3 ½ days each
Each phase starts about 3 hours later than previous phase
99
The Moon Globe is lit from one direction
Notice as you move around the globe that you only see a portion of the lit half
Familiarize yourself with each of the 8 phases
1010
Where and when the Moon rises and sets
How the Moon looks at different times
What causes the Moon’s changing appearance
How the Sun lights the Moon’s surface
How we see that surface from Earth
1111
Would you see a full moon in the middle of the afternoon? Explain your answer.
Would you see a first-quarter moon just before sunrise? Explain your answer.
Why can’t you ever see a new moon?
1212
In the small circles draw what the Moon looks like from Earth at each of the Moon’s eight phases.
Activity—Test yourself
Sun
1313
Describe the reason we see the Moon go through phases.
Define and summarize the Moon’s cycle of phases
Why does the Moon look different every day? Analyze how the Moon’s relationship to its
phases relates to phenomenon on Earth How does the Moon affect the Earth?
The MoonThe MoonLesson 13: EclipsesLesson 13: Eclipses 1414
Done—The Moon’s Phases
Next—The Moon and Eclipses