Directions: Place the images in the correct order from the birth of a star to its death. Briefly describe what stage in the lifecycle of a star is rep...
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
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The Life Cycle of a Star A gas cloud, if big enough, starts to shrink. The density and temperature increase so nuclear fusion can start. This is when Hydrogen is
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BIG HISTORY PROJECT
LIFE OF A STAR WORKSHEET (answer key) Directions: Place the images in the correct order from the birth of a star to its death. Briefly describe what stage in the lifecycle of a star is represented in each image. C
D
B
A
1. = C - Protostar - A star that has not yet reached the fusion stage. It grows by accretion, acquiring mass from surrounding interstellar dust and gas. 2. = D - Star - The star shines as nuclear reactions inside produce light and heat. The vast majority of stars in the Universe are in this stage, including our Sun. 3. = B - Red Giant - The star expands and glows red as it cools, eventually blasting away its outer layers. 4. = A - Supernova Remnant - The result of an explosion of a star; consists of material ejected from the explosion. Only the most massive stars become supernovae.
Sources: Credit: A - O. Krause (Steward Obs.) et al., SSC, JPL, Caltech, NASA; B - Credit: Daniel Huber, University of Sydney; Credit: C - DG Tau artist’s conception, W.M Keck Observatory; D - Credit: EIT - SOHO Consortium, ESA, NASA
