ORIGIN OF THE UZARA

Cards (22)

  • What is the term used to describe everything that exists in any place, including space, matter, and energy?
    The universe
  • What does the Big Bang Theory explain?
    The formation of the universe
  • How long ago did the Big Bang occur?
    About 10-15 billion years ago
  • What happened to energy and matter at the time of the Big Bang?
    They were concentrated in a small area that started expanding
  • What did the expanding, cooling universe first form?
    Subatomic particles and small atoms of hydrogen and helium
  • What occurred after about a billion years following the Big Bang?
    Matter clumped together forming stars and early galaxies
  • What is the evidence for the Big Bang Theory related to cosmic background radiation?
    Longwave background radiation coming from all directions in the universe
  • What is the significance of the cosmic background radiation?
    It supports the Big Bang Theory
  • What does the Doppler Effect describe in the context of stars?
    The apparent shift in wavelength of electromagnetic radiation due to the motion of the object emitting it
  • What happens to the light from stars in galaxies as the universe expands?
    It is shifted to the red end of the spectrum
  • What does a red Doppler shift indicate about an object's motion?
    The object is moving away from the Earth
  • What does a blue Doppler shift indicate about an object's motion?
    The object is moving toward the Earth
  • How does the distance of a galaxy from Earth relate to its red shift?
    The farther away a galaxy is, the greater the red shift
  • What is a galaxy?
    A collection of billions of stars and various amounts of gas and dust held together by gravity
  • How many galaxies are estimated to exist in the universe?
    Over 100 billion galaxies
  • What are the three classifications of galaxies based on their shape?
    • Elliptical
    • Irregular
    • Spiral
  • What galaxy is our solar system a part of?
    The Milky Way Galaxy
  • What shape is the Milky Way Galaxy?
    Spiral
  • EVIDENCE FOR THE BIG BANG THEORY
    1)Cosmic Background Radiation
    2)Doppler Effect /Red Shift
  • This radiation can be observed by the
    spectrum of a star (ROYGBIV)
  • SPIRAL GALAXY
    A) APPROX POSITION
    B) CENTRAL BULGE
    C) NUCLEUS
  • SPIRAL ULI
    A) SPIRAL ARM
    B) DISK