Web-assign_1 - PLANET EARTH Department of Earth&...

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Unformatted text preview: PLANET EARTH: Department of Earth & Planetary Sciences, spring ‘12 Rutgers University Dr. Christopher J. Lepre Geological sciences (100) [email protected] Web assignment, assignment #1: How Did Structure Form in the Universe? All answers must be placed on the scan­tron sheet. Answers place on this paper or answers submitted via email will not be accepted. http://map.gsfc.nasa.gov/universe/bb_cosmo_struct.html (1) The Big Bang theory: a. Cannot account for the origins of cosmic microwave background radiation b. Cannot explain the origin of light elements c. Assumes that matter and radiation are distributed uniformly in the universe (2) Most cosmologists believe that the galaxies that we observe today grew gravitationally out of small fluctuations in the density of the universe. a. True b. False (3) Our home galaxy is called the Milky Way a. True b. False (4) The universe was 1/5 its present size at about _________ years after the Big Bang. a. 1.2 million b. 1.2 billion c. 12 billion Tiny variations in the (5) _________ in the early universe leave an imprint in the cosmic microwave background radiation in the form of (6) _________ from point to point across the sky. a. temperature of matter b. density fluctuations c. density of matter d. temperature fluctuations Two types of galaxies are (7)_________ and (8) _________. a. Gaseous b. Terrestrial c. Elliptical d. Spiral (9) The temperature of 2.7251 Kelvin is 2.7251 degrees above absolute zero. a. True b. False ...
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  • Spring '12
  • ChristopherLepre
  • Cosmic Microwave Background, microwave background radiation, geological sciences, Department of Earth & Planetary Sciences, Dr. Christopher J. Lepre

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