Life Cycle of stars

Worksheet by Janine Highsmith
Life Cycle of stars Grade 8 worksheet preview
Subjects
Physics , Science
Grades
Grade 8 , Grade 9
Language
ENG
Assignments
30 classrooms used this worksheet

Life cycle of a star Watch the video before answering the questions below Fill in the blanks on the diagram below using the following word bank:Black holePlanetary NebulaRed GiantWhite DwarfNeutron StarRed Super GiantAverage Main Sequence StarStellar NebulaBlack DwarfMassive Main Sequence StarSupernova stellar nebula red giant planetary nebula white dwarf neutron star black hole red supergiant average main sequence star supernova massive main sequence star Black Dwarf Determine whether each description applies to a star with an average mass or a massive star. Average mass stars Red giant White dwarf Planetary nebula High mass stars Black hole Red supergiant Supernova Neutron star Fill in the blanks using the word bank from the drop-down menu. Stars are formed in clouds of gas and dust, known as nebula. Nuclear reactions at the center (or core) of stars provide enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its mass. Very large, massive stars burn their fuel much faster than smaller stars and may only last a few hundred thousand years. Smaller stars, however, will last for several billion years, because they burn their fuel much more slowly.Eventually, however, the hydrogen fuel that powers the nuclear reactions within stars will begin to run out, and they will enter the final phases of their lifetime. Over time, they will expand, cool and change color. The path they follow beyond that depends on the mass of the star.Small stars, like the Sun, will undergo a relatively peaceful and beautiful death that sees them pass through a planetary nebula phase to become a white dwarf. Massive stars, on the other hand, will experience a most energetic and violent end, which will see their remains scattered about the cosmos in an enormous explosion, called a supernova. Once the dust clears, the only thing remaining will be a very dense star known as a neutron star. If the star which explodes is especially large, it can even form a black hole. Analyze the diagram below of the H-R Diagram. Use the information to determine of the statements are TRUE or FALSE. Click on each statement and then decide whether it is true or false using the star chart below. True Stars are classified by temperature and luminosity Stars spend the majority of their life as main sequence stars. The Sun is an average, main sequence star. The mass of a star determines its life cycle. The Sun will become a red giant then a white dwarf. False The Sun is a supergiant. Blue stars are coolest and red stars are hottest. The color of a star determines its life cycle. All stars become blackholes Polaris is a white dwarf. Match the star name with the clue using the HR diagram Clue Star Name The blue star that is the hottest and brightest in the main sequence. Zeta Eridani The hottest white dwarf. Sirius B The brightest yellow supergiant. North Star (Polaris) The dimmest star. Van Maanen's Star The coolest star. Barnard's Star The coolest white star on the main sequence. Altair

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