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Earth's Motion and Seasons
Earth's Motion and Seasons
9
Science
8th Grade
02/26/2010

Additional Science Flashcards

 


 

Cards

Term

 

 

 

ASTRONOMY

Definition

 

  • the study of celestial bodies (bodies found in space)

 

Term

 

 

ROTATION

Definition

 

  • spinning of an object around its axis or center

 

Term

 

 

PERIOD OF ROTATION

Definition

 

  • time required for one full rotation
  • Earth's period of rotation is 24 hours

 

Term

 

 

AXIS

Definition

 

  • an imaginary line running through the center of an object
  • Earth's axis runs between the North and South Poles

 

Term

 

 

CIRCLE OF ILLUMINATION

Definition

 

  • the edge dividing daylight and darkness

 

Term

 

 

REVOLUTION

Definition

 

  • the movement of one object around another

 

Term

 

 

PERIOD OF REVOLUTION

Definition

 

  • time required for one full revolution
  • Earth's period of revolution is 365.25 days

 

Term

 

 

ORBIT

Definition

 

  • the movement or path of one celestial body around another

 

Term

 

 

ELLIPSE

Definition

 

  • elongated (flattened) circle
  • Earth and other planets have slightly elliptical orbits
  • comets have highly elliptical orbits

 

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