1. Other Objects in our Solar System

2. So far, we have covered planets
So far, we have covered planets... The other important objects in our Solar System (other than the Sun) are:
1) ___________________ 2) _____________________
3) ____________________ 4) ______________________

3. Shoemaker-Levy 9 Comet
Comet discovered by Carolyn and Eugene Shoemaker, an American husband-and-wife ___________________ team.
Canadian astronomer David Levy co-discovered it.
In 1994, chunks of the comet hit Jupiter, each impact leaving a mark the size of __________________ in Jupiter’s atmosphere.

4. Trans-Neptunian Objects:
Objects that circle the _____________ beyond the orbit of _______________.
Located in the __________________ (“KI-per”) Belt.
____________-shaped group of millions of small objects orbiting the Sun - ________________of material left over from the ________________ of the solar system.

5. Pluto
Was known as a ___________________ for 76 years until when it was demoted to ______________________.
Demoted because its orbit sometimes crosses Neptune’s orbit.

7. The Oort Cloud Spherical cloud of small icy fragments of ___________
Between AU and AU from the _____.
¼ the distance between the Sun and Proxima Centauri, the nearest _______________.

8. Comet (I)
Composed of _________________ material, ______ and __________.
Most originate from the _________________ or _________________.
If they get too close to ______________, its gravitational pull can nudge it into the _____________ solar system.
If get close enough to the Sun, forms a ______.

9. Comet (II)
Sun’s _____________ and _________ causes comet to release particles (debris) and gases.
Whitish Tail: sunlight reflecting off of released ________________.
Blue Tail: _______________: made of ionized gases.
Periodic comet: a comet that orbits the Sun

10. Asteroids & The Asteroid Belt (I)
Small, _________________ objects ranging in size from a tiny speck to __________ km wide.
Most originate in the asteroid belt between _______ and ________________.
Believed to be left over from the formation of the ___________________.

11. Asteroids & The Astroid Belt (II)
IAU has promoted __________, formerly an asteroid, to dwarf planet, since it is ________ km wide.
Some asteroids have their own __________.
Ida is shown to the right with its moon, Dactyl.

12. Meteoroids, Meteors, and Meteorites
Piece of ________ moving through space.
Rocky chunks that have broken off ______________ and _________________.
Meteor:
A meteoroid that hits Earth’s _________________ and burns up.
Meteor Shower:
When Earth passes through an area where there is a lot of excess material, like ________________ from a ________________.
Perseid meteor shower: occurs around August 12th every year.
Meteorites:
A ___________________ that is large enough to pass through Earth’s _______________________ and reach the ground, without being totally _______________________ up.

14. Asteroid and Meteorite Impacts
65 million years ago
Chicxulub crater, Mexico
Asteroid the size of a ______________ struck Earth
Collision sent debris from Earth up into the atmosphere
Earth was _______________for years
Global mass ___________________ (including dinosaurs).
39 million years ago
Haughton Crater, Nunavut
About 45, 000 years ago
Barringer Meteorite Crater, Arizona
Produced an explosion with energy equivalent to _____________ atomic bombs.
Hurricane-force winds
Falling rock would have _____________ everything within a 10 km radius.

17. NOTICE
Notice: there will be a Quest on Wednesday, May 24th. It will be on the following:
The Big Bang Video Worksheet
Evidence of the Big Bang Worksheet
Textbook work from 7.1.
Gizmos: Seasons, Phase of the Moon, 2D Eclipse, Tides
Constellations lesson
Solar System lesson
Planets of our Solar System Table
Today’s Lesson & Homework
YOU WILL BE ABLE TO USE 1 OR 2 ITEMS FROM YOUR BINDER – THESE WILL NOT BE REVEALED UNTIL RIGHT BEFORE THE TEST. (Therefore, make sure all of your homework is done!)

18. Homework Page 301, #1-3 Page 306, #1-5, 7, 8.
Review for Test: Page 312, #1-21, 22, 27-29, 30.