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Black Holes - Page 13

DIAGRAMMING DILEMMA - LEVEL 2

Venn diagrams are often used to organize information that compares and contrasts two or more different objects. In our diagram, circle B represents black holes while circle N represents neutron stars. Carefully read over the list of descriptive phrases found below. The number of a phrase that describes both a neutron star and a black hole should be written in the overlapping section of the two circles. The number of a phrase that describes only a black hole should be written in the non-overlapping section of circle B. The number of a phrase that describes only a neutron star should be written in the non-overlapping section of circle N.




Diagram




  1. escape velocity is greater than the speed of light
  2. have been called frozen stars
  3. endpoint of a star's lifecycle
  4. composed of a collapsed stellar remnant of less than 3 solar masses
  5. boundary marked by an event horizon
  6. was once a massive star
  7. has essentially zero volume
  8. does not glow brightly in optical light
  9. has a core composed mainly of neutrons
  10. has a very powerful gravitational pull

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A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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