Impacts

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The flashcards below were created by user alyssau12 on FreezingBlue Flashcards.


  1. When did the Big Bang occur?
    14 billion years ago
  2. When did the Sun form?
    5 billion years ago
  3. What is a small whose object ice can vaporize in sunlight forming an atmosphere of dust and gas? sometimes has a tail.
    comet
  4. What are the two types of comets?
    • long-term
    • short-term
  5. What is an asteroid?
    • usually made of rock but can be composed of metal
    • no ice
  6. What is a meteoroid?
    • a small particle from a comet or asteroid orbiting the sun
    • much smaller than asteroids
    • some are collision impact degrees
  7. What is a meteor?
    • light phenomena that results when a meteoroid enters Earth's atmosphere and vaporizes
    • "shooting star"
  8. What is a meteorite?
    a meteoroid that survives passage through earth's atmosphere and lands on earth's surface
  9. What is an airburst?
    an object that explodes in the atmosphere
  10. What is Tunguska?
    • caused by an airburst
    • occurred when a an asteroid/comet fragment collided into the earth

Card Set Information

Author:
alyssau12
ID:
252618
Filename:
Impacts
Updated:
2013-12-11 20:07:27
Tags:
Geo Final
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Description:
Final
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