As you can see from the Group 1 stars, the cooler or hotter a star is, the brighter it will be.  Group 2 and Group 3 stars do not follow this pattern.  Hence, there must be something besides temperature that can affect how bright a star is. Why would their brightness not be strictly related to their temperature? Consider what you know about the differences between stars in Groups 2 & 3 from notes, etc.*1 pointBrightness must be related to sizeBrightness must be most related to compositionBrightness must be only related to temperatureBrightness must have some other random causeBackSubmitClear form

Do group 2 stars follow the same pattern as stars in group 1?*1 pointYesNoOverall, are the stars in group 2 very bright or very dim?*1 pointVery brightVery dimAverageAre these stars hot or cool compared to other stars?*1 pointHotCoolAverageIs there a relationship between brightness and temperature of these stars?*1 pointYesNoIn group 2, these stars are ________ and ________.*1 pointHot, brightCool, dimHot, dimCool, brightGiants & Supergiants are (use notes/readings if needed!)*1 pointin the birth stage of thier livesin the stable portion of thier livesin the largest stage of their livesremnants of past stars

Why are stars hot and bright? ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

A star's luminosity is theGroup of answer choicesapparent brightness of the star in our sky.the surface temperature of the starrelated to the rate at which it produces energytotal amount of energy it radiates over its lifetime

How are temperature and color related for a star?Group of answer choicesthe hottest stars are bluethe hottest stars are redthe coolest stars are yellowThe coolest stars are ultraviolet

Go outside on a clear night, wait 15 minutes for your eyes to adjust to the dark, and look carefully at the brightest stars. Some should look slightly red and others slightly blue. The primary factor that determines the color of a star is its temperature. Which is hotter: a blue star or a red one? Explain