How long ago did the Big Bang occur, according to the theory?, 3.4 million years ago, 100 years ago, 13.8 billion years ago, 38,000 years ago, What is a theory?, an educated guess, backed by some form of evidence, a 100 percent proven statement, a scientific statement that never changes, Why have some scientific theories changed over time?, The scientist changed their mind., New evidence became available., Someone told them they were wrong., What is the best definition of a singularity?, 1 atom of a substance, all the things that formed after the initial explosion, a dense mass of all matter, space, and time in one tiny space smaller than an atom, What does the Big Bang say is still happening to the universe?, it is contracting, it is shrinking, it is expanding, What happened over time after the Big Bang?, contracting and heating, contracting and cooling, expansion and heating, expansion and cooling, Which word(s) explains the process after the Big Bang?, long lasting, brief, instant, Which best describes the universe before the Big Bang?, extreme heat and dense, cold and dark, The Big Bang is the only theory about the origin of the universe., True, False, What formed LAST according to the Big Bang theory?, atoms, stars, planets, galaxies, What evidence do scientists use to support the Big Bang Theory?, The redshift of galaxies and the Cosmic Microwave Background Radiation (CMBR), The changing brightness of the Sun and Moon, The phases of the Moon and the pull of gravity on Earth, The shapes of constellations and the number of stars in the sky

Big Bang

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