a. In the 1973 image, Mount St. Helens is surrounded by material that is bright
ID: 286467 • Letter: A
Question
a. In the 1973 image, Mount St. Helens is surrounded by material that is bright in filter #2. Based on the data you collected, what is this material?
b. In the 1983 image, Mount St. Helens is surrounded by material that is dark in filter #2. Based on the data you collected, what is this material?
c. Assume it was possible to take a similar Landsat image (in filter #2) of the city of Seattle 200 years ago. How would that image would look different from one taken today?
i. It would be brighter (higher albedo)
ii. It would be darker (lower albedo)
iii. It would be about the same (same albedo)
iv. It would not be visible in filter #2
d. Assume it was possible to take a similar Landsat image of the Yucatan Peninsula 65 Myrs ago, several months after the KT Impact. How would that image look different from one taken today?
i. It would be brighter (higher albedo)
ii. It would be darker (lower albedo)
iii. It would be about the same (same albedo)
iv. It would not be visible in filter #2
0.7 0.6 2 Anorthosite 0.5 0.4 Olivine 0.3 0.2 Green Leaf Basalt 0.1 0 400 500 600 700 800 900 1000 Wavelength (nm)Explanation / Answer
a. In the 1973 image, Mount St. Helens is surrounded by material that is bright in filter #2. Based on the data i collected. the material is anorthosite.
b. In the 1983 image, Mount St. Helens is surrounded by material that is dark in filter #2. Based on the data i collected. the material is olivine.
c. Assume it was possible to take a similar Landsat image (in filter #2) of the city of Seattle 200 years ago.
It would not be visible in filter #2
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