16. In a star heat creates In high A) low temperature B) green light c) cinders
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16. In a star heat creates In high A) low temperature B) green light c) cinders D)high pressure 17. The first thing a low mass star changes into when it runs out of hydrogen is a A) red dwarf B) white giant C) green giant D) red giant 18. A neutron star is the last stage of a mass star. A)high B) medium C) low Do low medium 19, The mass star has two red giant stages. A) low to medium B) blue C) high D) red 20. Our Sun starts in the the H-R diagrama. A) lower left part of B) upper right part of C) middle of the main sequence on D) top of the main sequence 21. Our Sun will become at the very end of its life cycle a A) white dwarf B) red giant C) white giant D) neutron star 22. After a low mass star runs out of fuel all that is left is A) hydrogen B) helium C) carbon D) iron 23. A refractor telescope uses A) at least 2 concave lenses B) at least two convex mirrors C) at least 2 convex lenses D) at least 2 mirrors and 2 lenses A) reflects light B) produces light by the 24. A white dwarf is visible because it proton-proton process C) burns carbon D) residual heatExplanation / Answer
17. Answer : D) red gaint
Explanation: The red gaint formed by star runs out hydrogen. The release of hydrogen causese star smaller in size by contraction,and core of the star gets hotter. This causes expansion in upper layer of the star, and as the star expands, it turns into a red giant.
18. Answer : A) high
explanation : The neurton star formed by supernova explosion of massive star that combined with gravitational collaps of the core of large star.
20. Answer : C) middle of main sequence
explanation : our sun in the HR diagram existed in middle of main sequence. And its surface temperature is 600ok and luminocity is 1.
21. Answer : B) red gaint
Explanation : ata the very end of the sun it continousely releasing the hydrogen atoms and it causes expansion of surface and contraction of core and it turns into red gaint star.
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