The Asteroid Crater

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Published: 1.01.2018
Level 6   |   Time: 3:10
Accent: British, American
Source: BBC Global News Podcast (12.27.2017)

TOEFL: A discussion on the effects of the asteroid event that caused the extinction of the dinosaurs.

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You can download the file [ HERE ].

    

triangle Directions


  1. REVIEW the vocabulary.
  2. LISTEN to the audio above.
  3. ANSWER the questions.
  4. CHECK your answers (Show Answers)

triangle Vocabulary


  • irrevocably [adv] - in a way that cannot be reversed
  • slam [v] - hit
  • the fall out [n] -the effects
  • demise [n] - death
  • come into focus [exp] - become clear
  • a crater [n] - a large bowl-shaped hole in the Earth
  • an asteroid [n] - a large rock in outer space
  • sediments [n] - small particles of rock
  • the impact site [n] -the place the asteroid stuck the Earth
  • toxic [adj] - poisonous
  • vents [n] - rivers of gas
  • hydrothermal [adj] - related to heated water in the Earth's crust
  • straight after [exp] - immediately after (in time)
  • a Hiroshima worth of energy [exp] - the same amount of energy released by the nuclear bomb dropped on Hiroshima in WWII.
  • the rim [n] - the outer edge
  • degassed [v] - gas is removed
  • Sulphur [n] - a yellow chemical element (S)
  • soot [n] - black dust that comes from burning something
  • photosynthesis [n] - how plants turn light into chemical energy
  • inhibit [v] - prevent or restrain
  • the food chain [n] - the system of how organisms (life) are dependent on each other as a food source

[n] - noun,  [v] - verb,  [phv] - phrasal verb,  [adj] - adjective,  [exp] - expression


triangle Comprehension Questions


  1. When did the asteroid hit the Earth?
    6 million years ago
    60 million years ago
    66 million years ago

  2. How fast was the asteroid moving?
    18 km/h
    18 km/m
    18 km/s

  3. Where did the asteroid hit the Earth?
    in northeastern Mexico
    in the Gulf of Mexico
    just north of Mexico

  4. What was the effect of the asteroid impact?
    Three quarters of all dinosaurs died.
    All of the animals on the Earth died.
    75% of all animal and plant life died.

  5. What surprised the researcher about the impact site?
    Life quickly recovered in the area.
    The crater that formed was very deep.
    A lot of gas was released after the impact.

  6. How much energy was released by the impact?
    the equivalent of the nuclear bomb dropped on Hiroshima
    the equivalent of 10 nuclear bombs dropped on Hiroshima
    the equivalent of 10 billion nuclear bombs dropped on Hiroshima

  7. How does the scientist describe the crater?
    It was surprisingly shallow.
    It was quite deep.
    It was not very wide.

  8. What happened to the sediments around the impact site?
    They released a lot of gas.
    They were destroyed.
    They were injected into the Earth's atmosphere.

  9. What effect did the release of Sulphur have on the Earth?
    It created numerous fires around the Earth.
    It increased the temperature of the Earth.
    It reduced the temperature of the Earth.

  10. How long did this effect last?
    a few months
    less than 20 years
    hundreds of years

  11. What inhibited photosynthesis?
    the release of Sulphur
    dust and soot in the atmosphere
    the freezing temperatures

  12. What effect did the inhibited photosynthesis have?
    It had a negative impact on the food chain.
    It had a positive impact on the food chain.
    It had no impact on the food chain.


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