ATM 200 - Natural Disasters

Ch 17 – Impacts with

Space Objects

Friday, 30 October 2015

Barringer Crater, AZ; photo by John S. Shelton

Daily Announcements:

1) Exam #2 Review Class is today, 3:40-4:45 PM, LC-18.

2) Exam #2 is Monday, Nov. 2. (Bring #2 pencils, pencil sharpener, eraser.)

3) Exam #2: Ch. 2, 3, 4, 5, 6, 7 and lecture material (videos too!)

4) Return to Eastern Standard Time (EST) this weekend.

Song #1: “Collide” by Howie Day

Song #2: “When Worlds Collide” by Powerman 5000

Text Source Today: Chapter 17 (p. 451-462)

· Impact Scars Notes Template

· Sources of Extraterrestrial Debris PDF DOC

· Asteroids

· Comets

· The Crater-Forming Process – Simple – Large

Study Guide Material (Stacey’s Guide) :

1) Why are there so few impact craters visible on Earth?

2) Know the difference between a meteoroid, meteor and meteorite.

3) What are asteroids and where are they located?

4) What is the composition of comets? Why does its “tail” point away from the Sun?

5) Why are comets thought to have possibly brought “life” to Earth?

6) About how many meteoroids enter Earth’s atmosphere every 24 hours?

7) What two factors determine the amount of energy released in an impact?

8) Be able to visually distinguish between a small impact crater from a large one.

9) What new minerals are created during a large body impact?

10) †What comet impacted Jupiter during 16-22 July 1994?