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The Birth and Life of Stars Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. In this lesson's sense, a cocoon is:

Question 2 2. When jets of gas from forming stars hit the ________, they form ________.

Question 3 3. 99% of the interstellar medium is made of:

Question 4 4. This refers to the dimming of light coming from a star due to its obstruction by the interstellar medium:

Question 5 5. What does a protostar have to do to become a star?

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Question 6 6. When a protostar is forming, heat is generated thanks to:

Question 7 7. Why does a brown dwarf form?

Question 8 8. What forces the hydrogen protons to collide to begin nuclear fusion?

Question 9 9. What is considered to be the trigger for protostar formation?

Question 10 10. Stars are born in the:

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Question 11 11. The jets of gas emitted by a forming stars are called:

Question 12 12. What is it that causes the temperature inside a forming star to increase?

Question 13 13. Which of these is the most massive type of star?

Question 14 14. Why must the temperature be so high for nuclear fusion to begin?

Question 15 15. A typical hydrogen nucleus consists of a:

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Question 16 16. Which of these stars will condense into a main sequence star the fastest?

Question 17 17. The regions of interstellar matter where protostars are born, the stellar nurseries, are called:

Question 18 18. The stages of most stars life in order are:

Question 19 19. The birth line is indicative of:

Question 20 20. How hot must it be for nuclear fusion to start?

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Question 21 21. The disks that form around protostars are called:

Question 22 22. These are dark lines in stellar spectra made by interstellar gas:

Question 23 23. What do most stars in our galaxy become at the end of their lives?

Question 24 24. These are microscopic solid particles in the interstellar medium:

Question 25 25. A star in its earliest stage of development is known as a:

The Birth and Life of Stars Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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