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Reading Expert Insight 1 ( Unit 9 )

  •  English    15     Public
    Ask & Answer
  •   Study   Slideshow
  • vocabulary: a complete loss of electrical power
    blackout
  •  20
  • to act on (someone or something) and cause a change
    affect
  •  25
  • What are the synonyms of the word " release " ?
    emit , radiate , give off
  •  25
  • Say the various meaning of the word " travel " ?
    1. 이동하다, 흐르다, 진행되다 2. 여행, 여행하다
  •  15
  • vocabulary: energy in the form of waves such as radio waves, light waves, X-ray waves
    radiation
  •  20
  • What is the main idea of the passage ?
    There are several types of solar flares that affect satellites, power grids, and electronic communications.
  •  25
  • How are C-class flares different from M-class and X- class flares ?
    C-class flares are not usually felt on Earth.
  •  20
  • What does a solar flare release ?
    It releases gas, electrons , and light rays.
  •  20
  • What types of problems can solar flares cause ?
    They block our electronic communications, knock out satellites, and shut down power grids.
  •  25
  • What happened in 1859 ?
    A solar flare shut down the telegraph system.
  •  20
  • Why are X-class flares dangerous ?
    Because X- class flares happen suddenly.
  •  25
  • How strong are X- class flares ?
    They are the biggest flares and 10 times stronger than M-class ones.
  •  25
  • What do gas, electrons, and light rays interact with ?
    They interact with our magnetic fields.
  •  20
  • Where can we see auroras ?
    We can see colorful lights at the North and South Poles.
  •  25
  • What can an M- Class flare cause ?
    It can cause not only minor radiation storms but also brief radio blackout in the polar regions.
  •  25