1. 1833

2. Things that didn’t make up planets or moons.
Minor Members
Things that didn’t make up planets or moons.
Meteors
Asteroids
Comets

3. Objective
Students will be able to explain the differences and similarities among asteroids, comets, and meteors.

4. Asteroids

6. Asteroids Rocky objects larger than a mile across.
Most are found in the Asteroid Belt between Mars and Jupiter
Earth has been hit by asteroids in the past.

7. Comets
Comets

8. Back

11. Comets Are mostly made of ice.
Orbit the sun. Many are in the Oort cloud.

13. Comets Are mostly made of ice.
Orbit the sun. Many are in the Oort cloud.
Their return can be predicted.

16. Radiant

19. Comets Are mostly made of ice.
Orbit the sun. Many are in the Oort cloud.
Their return can be predicted.
Their tail shows the direction of the sun, not which way they are headed.

21. Meteors

22. Small objects traveling through space.
Meteoroid
Meteor
Meteorite
Small objects traveling through space.
Meteoroids that have entered Earth’s atmosphere and are burning up – a “Shooting Star”.
A meteor that has hit the ground.
Phobos = fear
Deimos = terror

23. Meteorite
Meteor
Meteoroid

26. We Have Been Hit
The moon shows its record of impacts because it has no erosion.

29. We Have Been Hit
The moon shows its record of impacts because it has no erosion.
Earth shows only recent signs of impact.

31. Tunguska, Siberia
1908

33. We Have Been Hit
The moon shows its record of impacts because it has no erosion.
Earth shows only recent signs of impact.
One major theory says that we were hit 65 MYA and this killed the dinosaurs.

40. Iridium Iridium is very rare here on Earth but plentiful in asteroids.
A layer of Iridium is found at the K-T Boundary(65 MYA)