Lab questions
- 1. 6) A Red giant star would most likely have a temperature of A) 5,000ºC B) 10,000ºC C) 20,000ºC D) 30,000ºC 7) According to the graph, the Sun is classified as a A) main sequence star with a temperature of approximately 4,000ºC and a luminosity of 100 B) main sequence star with a temperature of approximately 6,000ºC and a luminosity of 1 C) white dwarf star with a temperature of approximately 10,000ºC and a luminosity of 0.01 D) blue supergiant star with a temperature of approximately 20,000ºC and a luminosity of 700,000 8) An astronomer can estimate the temperature of a star by observing its A) size B) shape C) color D) brightness 9) Red giant stars have greater luminosity than our sun mainly because they are A) hotter B) farther away C) larger D) older 10) Which star color indicates the hottest star surface temperature? A) blue B) white C) yellow D) re 1 - 5 6 - 10 11 - 15 16 - 18
- 2. Base your answer for questions 11 to 13 on the diagram below, which shows two possible sequences in the life cycle of stars, beginning with their formation from nebular gas clouds in space. 11) Stars like Earth’s Sun most likely formed directly from a A) nebula B) supernova C) red giant D) black dwarf
- 3. 12) According to the diagram, a star like Earth’s Sun will eventually A) explode in a supernova B) become a black hole C) change into a white dwarf D) become a neutron star 13) According to the diagram, the life-cycle path followed by a star is determined by the star’s initial A) mass and size B) temperature and origin C) luminosity and color D) luminosity and structure 14) The diagram below shows the spectral lines for an element. Which diagram best represents the spectral lines of this element when its light is observed coming from a star that is moving away from Earth? A) B) C) D) 15) Stars are believed to undergo evolutionary changes over millions of years. The flowchart below shows stages of predicted changes in the Sun. According to this flowchart, the Sun will become A) hotter and brighter in stage 2, then cooler and dimmer in stage 3 B) cooler and dimmer in stage 2, then hotter and brighter in stage 3 C) hotter and dimmer in stage 2, then cooler and brighter in stage 3 D) cooler and brighter in stage 2, then hotter and dimmer in stage 3 16) Small cool stars would most likely appear to be A) blue B) red C) yellow D) white 17) What type of star is Polaris?
- 4. A) White Dwarf B) Supergiant C) Red Giant D) Main Sequence 18) Which of the following stars is hottest? A) a red giant B) a white dwarf C) the sun D) a red dwar 2. What if a source has a temperature of about 10,000 Kelvin, and a luminosity of about 10-3. Explain what type of source this could be, and the part of its life cycle the source is enduring. 3. Make a line plot superimposed on the H-R diagram that would trace the entire life cycle of our star, the Sun. Remember all of the stages of this main-sequence, low mass star. 4. What will be the final stage of evolution (black dwarf, neutron star, or black hole) for each of the following: (Hint: reread the text in Sections I, II, and III) (a) Type O main sequence star (b) Type A main sequence star (c) Type G main sequence sta