Fill in the Blanks Lesson 1.1b Life Cycle of a StarOnline version Reading Assiognment. Read the article on the life cycle of a star before completing this assignment. by Eric D Norman 1 collapse supernova Main Sequence Star cooler condenses Blackhole nebula Helieum Supergiant iron Hydrogen nebula energy Red Giant gravity Neutron star Main Sequence Star protostar supernova T-Tauri Phase All stars start as a . A is a large cloud of gas and dust . Gravity can pull some of the gas and dust in a nebula together . The contracting cloud is then called a . A protostar is the earliest stage of a star ? s life . A star is born when the gas and dust from a nebula into the center during the . Once a star has " turned on " , start using Hydrogen as fuel , it is known as a . In a the protons of hydrogen are converted into atoms of . This process gives off a tremendous amount of that creates an outward pressure that counteracts the inward pressure caused by . When a Main Sequence Star begins to run out of fuel , the star becomes a or a . Red giants have surfaces than the main - sequence star , and because of this , they appear red rather than yellow . When hydrogen runs out , helium is used . When helium runs out the next highest element is used , until appears at the core . The iron fusion reaction absorbs energy , which causes the core to in on itself . This implosion transforms massive stars into a . During a , dust and gas is thrown out into space , while the core is condensed into either a or a .
New game