KEY-Big Bang Theory Research Graphic Organizer Directions: Complete the graphic organizer as you read the informational text about the Big Bang Theory and its supporting evidence.

Big Bang Theory All of the matter in the universe was What does this theory state? compressed into a tiny mass which then exploded into the observable universe. Who developed this theory? Georges Lemaître

When was this theory developed? 1920s

Evidence Piece #1: Evidence Piece #2: Cosmic Evidence Piece #3: Big Hubble’s Law Microwave Background Bang Nucleosynthesis Who discovered this piece of Radiation Who discovered this piece of evidence? Who discovered this piece of evidence? evidence? Edwin Hubble George Gamow Arno Penzias (developed hypothesis) Ralph Alpher and Robert Wilson Robert Herman worked together on research and calculations.

When was it discovered? When was it discovered? 1924 When was it discovered? 1948 -Paper was 1960s published in 1929

How does this piece of evidence How does this piece of evidence support the Big Bang Theory? How does this piece of evidence support the Big Bang Theory? support the Big Bang Theory? Scientists discovered that the All galaxies are moving away from universe has ratios of hydrogen, each other with the rate of Cosmic Microwave Background helium, and other trace elements movement being proportional to Radiation is found throughout the that one would expect within a the distance each galaxy is from universe and is emanating from all large star. This led them to believe another. For example, the farther that the universe acts as one “giant away a galaxy is from the Milky directions. Scientists theorize that star” by fusing together hydrogen to Way, the faster it is moving away this is leftover energy from the big create helium, and eventually from our galaxy. This means that at bang explosion, that started as heavier elements. Scientists one point, the galaxies were all visible light energy and has now theorize that the extreme located in one place. slowed to microwave radiation. temperature and density of the early universe fused subatomic particles into the first element, Specific wording may vary! Created by H. Bradley hydrogen.