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Mastering Astronomy Final Study Guide Chapters 1-18
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Earth is made motly of metals and rocks. Where did the material come from? Answer- It was made by nuclear fission of uranium and other radioactive materials What is nuclear fusion? Answer- the process of combining lightweight nuclei to make heavier nuclei Which of the following statements does not use the term light-year in an appropriate way? Answer- It will take me light-years to complete this homework assignment Suppose we look at a photograph of many galaxies. Assuming that all galaxies formed at the same time after the Big Bang, which galaxy appears to us as the youngest? Answer- The galaxy that is furthest from us.
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