EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER...
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Transcript of EXIT CHAPTER CHAPTER 25.1 Origin and Properties of the Moon 25.2 The Moon’s Motions CHAPTER...
EXIT CHAPTER
2525CHAPTER
25.1 Origin and Properties of the Moon
25.2 The Moon’s Motions
CHAPTER OUTLINECHAPTER 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
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
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
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
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
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
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