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EXIT CHAPTER 25 25 CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

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Page 1: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

EXIT CHAPTER

2525CHAPTER

25.1 Origin and Properties of the Moon

25.2 The Moon’s Motions

CHAPTER OUTLINECHAPTER OUTLINE

Earth’s Moon

Page 2: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

Scientists think the moon formed after a large

object, about the size of a planet, hit Earth.

CHAPTER

SECTION OUTLINESECTION OUTLINE

VOCABULARY25.1 Origin and Properties of the Moon

2525 Earth’s Moon

1. Earth is hit off-center by a planet-sized object.

2. The impact heats and deforms both bodies. Some rocky debris remains in orbit around Earth.

3. The debris ring, made of rock from the outer layer of both objects, gradually coalesces, forming the moon.

astronomy

meteoroid

crater

micrometeoroid

maria

mascons

rille

ray

regolith

Page 3: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

Dark areas called maria are great basins and level

plains on the moon. They are younger than the

lighter lunar highlands. Lunar highland rocks are

older than mare rocks.

CHAPTER

SECTION OUTLINESECTION OUTLINE

VOCABULARY25.1 Origin and Properties of the Moon

2525 Earth’s Moon

The same side of the moon always faces Earth.

Mare

Highland

astronomy

meteoroid

crater

micrometeoroid

maria

mascons

rille

ray

regolith

Page 4: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

Lunar rocks have textures similar to Earth rocks but

differ in composition.

CHAPTER

SECTION OUTLINESECTION OUTLINE

VOCABULARY

Most lunar craters were caused by the impact of

meteoroids; rays of shattered rock and dust were

splashed out by the impacts.

25.1 Origin and Properties of the Moon

2525 Earth’s Moon

Regolith is the loose rock material covering the

moon’s surface. It is formed as micrometeoroids

smash into and erode the moon’s surface.

astronomy

meteoroid

crater

micrometeoroid

maria

mascons

rille

ray

regolith

Page 5: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

The moon’s orbit is tilted 5 degrees relative to the

plane of Earth’s orbit. The moon’s movement

around Earth causes it to rise later each day and to

go through phases.

CHAPTER

SECTION OUTLINESECTION OUTLINE

VOCABULARY25.2 The Moon’s Motions

2525 Earth’s Moon

Light from the Sun

Waning Crescent

Waxing Crescent

New Moon

Full Moon

Waning Gibbous

Waxing Gibbous

Last Quarter

First Quarter

Phases of the Moon

phases

waxing

waning

gibbous

umbra

penumbra

lunar eclipse

solar eclipse

Page 6: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

A lunar eclipse occurs when Earth passes between

the sun and the moon, and the moon is within

Earth’s shadow.

CHAPTER

VOCABULARY

A solar eclipse occurs when the moon passes

between the sun and Earth, and the moon’s shadow

falls on Earth.

25.2 The Moon’s Motions2525 Earth’s Moon

Total Solar EclipseSun Earth

Moon

SunEarth

Penumbra

Moon

Umbra

phases

waxing

waning

gibbous

umbra

penumbra

lunar eclipse

solar eclipse

SECTION OUTLINESECTION OUTLINE

Page 7: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

A lunar eclipse occurs when Earth passes between

the sun and the moon, and the moon is within

Earth’s shadow.

CHAPTER

VOCABULARY

A solar eclipse occurs when the moon passes

between the sun and Earth, and the moon’s shadow

falls on Earth.

25.2 The Moon’s Motions2525 Earth’s Moon

Partial Solar EclipseSun Earth

Moon

SunEarth

Penumbra

Moon

Umbra

phases

waxing

waning

gibbous

umbra

penumbra

lunar eclipse

solar eclipse

SECTION OUTLINESECTION OUTLINE

Page 8: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER HOME

A lunar eclipse occurs when Earth passes between

the sun and the moon, and the moon is within

Earth’s shadow.

CHAPTER

VOCABULARY

A solar eclipse occurs when the moon passes

between the sun and Earth, and the moon’s shadow

falls on Earth.

25.2 The Moon’s Motions2525 Earth’s Moon

Annular Solar Eclipse

Sun Earth

Moon

SunEarth

Penumbra

Moon

Umbra

phases

waxing

waning

gibbous

umbra

penumbra

lunar eclipse

solar eclipse

SECTION OUTLINESECTION OUTLINE

Page 9: EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER OUTLINE Earth’s Moon

CHAPTER

CHAPTER HOME

2525 Earth’s Moon

This is the end of the chapter presentation of lecture notes. Click the CHAPTER HOME button or exit the presentation.


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