The Life Cycle of a Star (Pages 707-714) STAGE 1 What object or astronomical body do stars come from? ___________________________ What is a Nebula? ________________________________________________________ The first stage of a star is called ________________ What color is it?_____________________________ How long could it take for a nebula to contract into a protostar? ____________________ During this stage of life what happens? •
• STAGE 2 What is the second stage of life for a star called? ________________________________ When does a protostar enter this stage? ________________________________________ _______________________________________________________________________ _ How long does a star spend in its second stage of life? Please explain below. _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ STAGE 3 What is the third stage of life for a star called? ________________________________ What two things happen to the core of the star causing it to become a Red Giant? _______________________________________________________________________
_ _______________________________________________________________________ _ _______________________________________________________________________ _ How big is a Red Giant? _______________________________________________ Why is it red? _______________________________________________________________________ _ _____________________________________________________________ (BACK) STAGE 4 Describe how each of these three types of stars burns out. Low-Mass Stars _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ Medium-Mass Stars _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _
Massive Stars _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _ _______________________________________________________________________ _