Chapter 28

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

Brainpop The Moon

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.

Images of the Moon’s Craters

Formation of the MoonGiant

Impact Hypothesi

s

• 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 Bombardmen

t

• Asteroids and debris left over from the formation of the solar system continually struck the moon forming craters.

Quick Check! INTERACTIVE

• Finish the bubble map…

Earth’s Moon

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

Asteroid Impacts

• Dinosaur extinction caused by an asteroid

• Can cause huge craters

Oort Cloud

•Most comets originate here•A spherical cloud of dust

and ice beyond Pluto• Surrounds our solar system

INTERACTIVE In groups

1. Create a Poster of one of the following:a) Earth’s Moonb) Other Moons (choose 1)c) Asteroidsd) Cometse) Meteoroids

2. Include a drawing, definition, and interesting facts (at least 5)

3. Present to Class