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Chapter 28 SOARStandard 1b. Students know the evidence from Earth and
moon rocks indicates that the solar system was formed from a large nebular cloud of dust and gas about 4.6 billion years ago.
Objective 1 List and describe the 4 surface features of the moon.
Objective 2 Summarize the 3 stages by which the moon formed.
Objective 3 Compare and Contrast the moons of other planets.
Objective 4 Describe asteroids and comets.
Objective 5 Compare meteoroids, meteorites, and meteors
Assessment Chapter TestReview Daily Bellwork, Science
Starters
VocabularyCreate a flashcard for the following key terms…they begin on page 719.
• Satellite• Moon• Galilean moon• Asteroid
• Comet• Oort cloud• Meteoroid• Meteor
Earth’s Moon
•Any large body that orbits a planet is a SATELLITE. If it is a natural satellite, it is a MOON.
The Lunar Surface• Lighter areas are HIGHLANDS (mountains/volcanoes)• Darker areas are MARIA (lava fields)• The surface of the moon is covered in bowl-shaped
depressions called CRATERS– Most of the moon’s craters formed from ASTEROIDS
colliding with the moon for 4 billion years– The moon is covered in craters because it has no
atmosphere to protect it• The moon is covered in dust and rock from space debris
called REGOLITH• Lunar rocks are very similar to Earth’s rocks. They are
Igneous.
Formation of the Moon
Giant Impact
Hypothesis
• Mars-sized object collided with Earth 4 billion years ago. Chunks ejected from earth and orbited the Earth, clumping together to form the moon.
Lunar Interior
• The moon was originally covered in an ocean of molten rock. Over time it cooled and denser material sank to the center giving it layers.
Meteorite Bombardment
• Asteroids and debris left over from the formation of the solar system continually struck the moon forming craters.
Satellites of Other Planets
• Mars, Jupiter, Saturn, Uranus, Neptune, Pluto all have moons
• The 4 largest moons of Jupiter are known as the GALILEAN MOONS–3 are bigger than the Earth’s moon–Io, Europa, Ganymede, Callisto–Ganymede is larger than Mercury
Alien Moons Interactive Video
• Tape the fill-in sheet into your notebook• Answer the questions as we watch the
video
Moons of the Solar System Scavenger Hunt
•Working in groups, use the books and laptops to finish the Scavenger Hunt•1 paper per group
Asteroids Comets Meteoroids
Fragments of rock that orbit the sunMore than 50,000
Ceres = largestAsteroid Belt=
Main area of most asteroid orbits
between the inner and outer
planets.
Looks like a star with a tail
Made of ice, rock, and cosmic dust
Orbit the sunTails form when
sunlight melts the ice into gas
Small bits of rockLess than 1mm
When a meteoroid enters the atmosphere it burns up, creating a
bright light or ‘shooting star’ or
METEORMeteorite= if a
meteoroid does not burn up entirely and
lands it is called a METEORITE
Oort Cloud
•Most comets originate here•A spherical cloud of dust
and ice beyond Pluto• Surrounds our solar system