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| James McVey, NOAA |
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John McColgan, BLM |
| A. Tropical Island, Palau Islands |
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B.Forest fire, Montana, U.S.A. |
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| NASA |
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NASA |
| C. Oil wells burning, Kuwait and the Persian Gulf |
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D. Suez Canal, Egypt |
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| EPOD/USRA |
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Earth Observatory, NASA GSFC |
| E. Wind farm, Norfolk County, England |
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F. Mount Etna, a volcano on the island of Sicily, Italy |
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4. In each image, look for evidence of materials and energy moving among the spheres.
- List the major features in the image and tell which sphere each one represents.
- Describe sphere interactions you can infer from the scene.
- Whenever possible, follow the results of an interaction through all four spheres.
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