Read each question carefully and choose the letter of the best answer. Use the following choices to answer questions 1-3. a. nebula nucleosynthesis b. supernova nucleosynthesis c. stellar nucleosynthesis d. big bang nucleosynthesis 1. Which process is probable to produce the heaviest element? 2. When are hydrogen and helium formed? 3. When are carbon and oxygen formed? 4. What elements will be produced when carbon undergoes fusion reactions? a. hydrogen and helium b. beryllium and hydrogen C. oxygen and neon d. xenon and gold 5. When does a massive star enter the stage of becoming a supernova? a. when the star has used up all its hydrogen fuel b. when the star has burned all its oxygen c. when the chromium fusion stop 6. Which of the following describes stellar nucleosynthesis? a. It is the formation of light elements such as hydrogen and helium. b. It is the process by which elements are produced in gas clouds. c. It is the formation of elements during a supernova explosion. d. It is the process by which elements are formed within stars. 7. What is the heaviest element formed before a star dies out? C. silicon d. magnesium a. gold b. iron 8. Inside of you, are elements like carbon, oxygen, and nitrogen. Where did all these elements come from? c. from a red giant star d. from a supergiant star a. from the sun b. from the earth 9. Which of the following are the first two most common elements in the universe that makes up your body? a. carbon and oxygen b. carbon and nitrogen c. hydrogen and helium d. hydrogen and oxygen 4 10.When a star's core runs out of hydrogen, the star begins to die out and expands into a red giant. What element will be formed first during this phase while helium atoms are fused? a. helium b. carbon C. oxygen d. hydrogen

Read each question carefully and choose the letter of the best answer. Use the following choices to answer questions 1-3. a. nebula nucleosynthesis b. supernova nucleosynthesis c. stellar nucleosynthesis d. big bang nucleosynthesis 1. Which process is probable to produce the heaviest element? 2. When are hydrogen and helium formed? 3. When are carbon and oxygen formed? 4. What elements will be produced when carbon undergoes fusion reactions? a. hydrogen and helium b. beryllium and hydrogen C. oxygen and neon d. xenon and gold 5. When does a massive star enter the stage of becoming a supernova? a. when the star has used up all its hydrogen fuel b. when the star has burned all its oxygen c. when the chromium fusion stop 6. Which of the following describes stellar nucleosynthesis? a. It is the formation of light elements such as hydrogen and helium. b. It is the process by which elements are produced in gas clouds. c. It is the formation of elements during a supernova explosion. d. It is the process by which elements are formed within stars. 7. What is the heaviest element formed before a star dies out? C. silicon d. magnesium a. gold b. iron 8. Inside of you, are elements like carbon, oxygen, and nitrogen. Where did all these elements come from? c. from a red giant star d. from a supergiant star a. from the sun b. from the earth 9. Which of the following are the first two most common elements in the universe that makes up your body? a. carbon and oxygen b. carbon and nitrogen c. hydrogen and helium d. hydrogen and oxygen 4 10.When a star's core runs out of hydrogen, the star begins to die out and expands into a red giant. What element will be formed first during this phase while helium atoms are fused? a. helium b. carbon C. oxygen d. hydrogen