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Composition of hot vaporized material

1. As mentioned in an earlier of this project, occasionally an asteroid fragment makes its way to Earth. As the fragment falls through the atmosphere, it is heated and some of the material is vaporized. Explain how you could determine the composition of this hot vaporized material from the light it emits. 2. Some asteroid fragments end up on the surface of Earth. It is possible for such a fragment to be radioactive. What is the chief cause of radioactivity? If you had a radiation detector that could measure the amount of radiation but not the type of radiation ‐ how could you determine which type of radiation was being emitted? 3. How could the age of this fragment be determined? 4. Asteroids are mainly composed of metals like iron and nonmetals like carbon. Explain at least three differences between metals and nonmetals, and describe the locations of metals and non-metals within the periodic table. Specifically use iron and carbon in your explanation. 5. If the asteroid fragment contains carbon, it may burn when entering Earth’s atmosphere. What is the most likely compound to result from this process? Which type of chemical bond would result from this process? Of the types chemical reactions studied in this course, which type would this be? Be sure to fully explain all of your answers. 6. Asteroids can be classified into two broad groups based on their composition and location: carbon-rich asteroids dominate the outer part of the asteroid belt, whereas metal-rich asteroids dominate the inner part of the belt. Analysis of the fragment we have discussed in this project reveals that it contains nearly equal amounts of metals and carbon. Can you conclude that the original whole asteroid had a similar composition? Can you conclude with a high degree of confidence that the asteroid originated in the middle regions of the asteroid belt? Explain your reasoning. If you would need more data from the asteroid analysis, what would you like to see? 7.  The Law of Conservation of Energy tells us that “energy cannot be created nor destroyed.” At the center of our Solar System is the Sun, and the Sun is constantly generating energy allowing Earth to have habitable conditions for life to exist. What is the source of the Sun’s energy? Does the Law of Conservation of Energy apply here? Explain your answer.

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