Science Glossary Terms

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Science Glossary Terms
2014-02-27 22:18:48
Science Glossary terms
Chapter 8
Glossary terms for Chapter 8
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  1. Refracting Telescope:
    Is a lens that uses a lens to collect light from an object.
  2. Electromagnetic Radiation:
    Is radiation consisting of electromagnetic waves that travel as fast as light.
  3. Reflecting Telescope:
    A telescope that uses a mirror to collect light from an object.
  4. Satellite:
    A human made object or vehicle that orbits celestial bodies. 
  5. Orbiters:
    Are observatories that orbit other celestial objects.
  6. Solar Nebula Theory:
    Is a theory that describes how stars and planets form from contracting, spinning disks of gas and dust.
  7. Star:
    Is a celestial body made up of hot gases mostly made up of hydrogen and some helium.
  8. Nebula:
    Is a cloud of dust in outer space, seen in the night sky as an distinct silhouette or a indistinct bright patch.
  9. Protostar:
    Is a hot condensed object at the center of a nebula.
  10. Nuclear Fusion:
    Is the process of energy production which hydrogen particles combine to form helium particles.
  11. Photosphere:
    Is the surface layer of the Sun.
  12. Sunspot:
    Is an area of strong magnetic fields on a photosphere.
  13. Solar Wind:
    Is a stream of fast moving charged particles ejected from the Sun into the solar system.
  14. Solar Flare:
    Is a brief explosion of intense energy radiation from the Sun's surface.
  15. Importance of the Sun:
    It has great importance because it creates photosynthesis that a plant needs in order to survive and continue the life cycle. As well, the Sun provides the heat that we need in order to survive, if we didn't have the Sun, I wouldn't be typing right now.
  16. Luminosity:
    Is a star's total energy output/second, its power is in joules/second.
  17. Absolute Magnitude:
    Is the magnitude of a star that we would observe if the star is 32.6 light-years away from Earth.
  18. Spectroscope:
    An optical instrument that produces a spectrum from a narrow beam of light.
  19. Spectral Lines:
    Is certain specific wavelengths within a spectrum characterized by lights.
  20. Hertzsprung-Russell (H-R) diagram:
    Is a graph that compares the properties of stars.
  21. Main Sequence:
    Is a narrow band of stars on the H-R diagram that runs diagonally from the upper left (bright, hotter stars) to the lower right (dimmer, cooler stars). 90% of stars, as well as the Sun, are n this sequence.
  22. White Dwarf:
    A small dim, hot star.
  23. Supernova:
    Is a massive explosion that entire outer portions of a star is blown off.
  24. Neutron Star:
    Is a star so dense that only neutrons can live in its core.
  25. How low-mass stars evolve:
    Low-mass stars consume their hydrogen slowly over a period of up to 100 billion years, until they run out of hydrogen and become a white dwarf.
  26. How Intermediate-mass stars evolve:
    Intermediate-mass stars consume their hydrogen faster than low-mass stars, when they reach their hydrogen usage, in about 5 billion years, it will become a red giant and it will eventually become a white dwarf in the end.
  27. How High-mass stars evolve:
    High-mass stars consume their hydrogen even faster than Intermediate-mass stars. When these stars run out of hydrogen, they will become a supergiant and a supernova will occur.
  28. Black Hole:
    A black hole is a tiny patch of space that has no volume, but has mass.