Planetary Geology for Teachers

Preview of Concepts and tasks in Module 5

Concepts and Vocabulary

meteoroid
meteorite
stony
achondrites
carbonaceous chondrites
undifferentiated
stony-iron
iron
chondrites
partial melting

regolith
SNC meteorites
differentiated
volatile elements
impact melts
Ida, Gaspra
Phobos, Deimos
spectroscopy
asteroids
Main Belt asteroids
Apollo asteroids

 

Preview of tasks

Task 1.  Meteorite Study Questions and Activities

1.   Why would more meteorites be available on the glacier ice of Antarctica than other places in the world?

2.  Inspect images of the lunar and Martian surfaces below. Many of the small craters were caused by meteorite impacts (some may be volcanic craters). Why are there so many more craters on the Moon and Mars compared to the Earth? List at least 2 reasons.

3.  Define the three types of meteorites and their major sub-types.

4.  Give three scientific reasons that will calm people's fear of a large asteroid impact with Earth.

5.  Visit the Frequently Asked Questions About Meteorites page at the University of Arkansas: http://www.uark.edu/depts/cosmo/metfaqs.htm and Exploring Meteorite Mysteries - a NASA site, and maybe http://www.meteorite.com .   Write a paragraph describing how one differentiates between meteorites and "meteowrongs."  Include descriptions of objects that are often mistaken for meteorites.

6.  Go outside after dark and watch the sky for a specified length of time, say 30 minutes or one hour.  Count the number of "falling stars."   Give the number as a ratio, x/minute, or x/hour, the location you made your observation, the date and time.

Task 2.   Asteroid Study Questions

1.  Compare and Contrast Phobos and Deimos according to the following parameters:

    • date of discovery
    • radius
    • composition

2.  How do Phobos and Deimos differ from Ida and Gaspra?

3.  Plot the locations of each planet according to its distance from the Sun. Now predict the approximate location of a would-be planet between Mars and Jupiter. Is this where the asteroid belt is really located? Why do scientists believe the asteroid belt is not a broken up missing planet?

4.  Why are asteroids such irregular shapes?

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