Teacher Resource

Answer Key to Treasure Hunt Summary Sheet

1. 1,200 meters

2. -9.98 - -7.8 degrees latitude

3. -7.3 degrees latitude

4. 600 meters

5. 9.11-9.25 degrees latitude

6. The flat bottom indicates there may have been drifting, from storms.

7. 400 meters

8. 1700 meters

9. 1:4.25

10. simple

11. 21.4 degrees latitude

12. rill

13. Olympus Mons

14. Material may have come from the mountain when the escarpment
sheered off.

15. From the visible shape of the mountain’s profile.

16. 2 craters, 2 possible slumped walls

17. A large impact crater containing a small, younger crater.


Answer Key to Crater Activity Student Sheet

Data Chart
____________________________________________________
Crater Depth Left Wall Angle Right Wall Angle
(meters) (degrees) (degrees)

1 2500 30 40

2 1800 74 72

3 1750 65 61

4 1800 45 35

____________________________________________________
1.
Crater Symmetry Degree of Difference
Ex. Highly asymmetrical 40 degrees

1 Fairly symmetrical 10 degrees

2 Very symmetrical 2 degrees

3 Very symmetrical 4 degrees

4 Fairly symmetrical 10 degrees

2. gravity erosion - slump / wind erosion - drifting against one side of the crater wall

3. Craters 1 - 4 - 3 - 2

4. For 3 of the 4 craters (# 2,3,4) the left wall was more steep than the right.

5. As the angle value increases, the steepness decreases.

6. Craters 2 and 3

7. & 8. & 9. - In chart below.

Crater Path Location Verify (for # 9)

Ex. southeast of center highlands 40oN - 120oW

1 west of center highlands 48.3oN - 220.55oE

2 almost centered highlands 5.86oN - 252.5oE

3 east of center highlands 10.7oN - 225.68oE

4 center of crater highlands 46.5oN - 0.15oW

10. Crater 4

11. This is a good brain teaser.
One may think that rugged crater walls and steep slopes identifies young craters, and that smooth gentle slopes or shallow craters, equals old. While this represents good thinking it does not consider-
-soil drifting into craters from storms
-lava flowing into the crater
-flood water filling the crater with wash material

12. Earth is a more dynamic planet. The items listed in #11 occur on Earth, but this planet also experiences;
-the activity of biologics
-active volcanism
-surface recycling from tectonic plate subduction
-earthquakes
-71% water cover to hide and destroy craters