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5 Written questions

5 Matching questions

  1. refraction
  2. ionosphere
  3. El Nino
  4. mechanical wave
  5. frequency
  1. a the number of complete wavelengths that pass a point in a given time
  2. b The wave with no transfer of matter - This wave requires a medium.
  3. c bending of a ray of light
  4. d layer of electrically charged particles in the thermosphere that absorbs AM radio waves during the day and reflects them back at night
  5. e the name given to the periodic warming of the ocean that occurs in the central and eastern Pacific

5 Multiple choice questions

  1. a dense, collapsed core with a very strong gravitational pull that forms when a very massive star becomes a supernova
  2. the apparent change in frequency of electromagnetic or sound waves caused by the relative motions of the source and the observer
  3. the distance light travels in one year
  4. Air circulation at surface creates wind patterns (Earth's shape and rotation causes variable latitudinal wind deflections.)
  5. the condition of Earth's atmosphere at a particular time and place

5 True/False questions

  1. concave lensthe state of separate elements joining or coming together


  2. supernovaareas on the sun's surface that are cooler and less bright than surrounding areas, are caused by the sun's magnetic field, and occur in cycles


  3. main sequencethe act of splitting off into different directions


  4. revolutionthe movement of an object around another object


  5. convex lensa lens that is thinner in the middle than at the edges


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