Soal dan Pembahasan TBI (Reading Comprehension) Bagian 17

  1. Soal
  2. Reading Comprehension

            Supergiants can  gave  masses  from  10  to  70  solar  masses  and  brightness from  30,000  up  to hundreds of thousands times the solar luminosity. They vary greatly in radius, ussually from 30 to 500, or even in excess of 1,000 solar ardii. The Stefan-Boltzmann law dictates that the relatively cool surfaces of red supergiants radiate  much  less  energy  per  unit  area  then  those  of  blue  supergiants; thus,  for  a  given luminosity red supergiants are larger than their blue counterparts.

            The  most  massive  superstars  in  the  Galaxy  have  surface  temperatures of  between  20,000  – 50,0000oC and appear blue in colour. They are designated ‘blue supergiants’ due to their appearance and the enormous amounts of energy that they can radiate. The best known example is Rigel, the brightest star in the constellation of Orion. It has a mass of around 20 times that of the Sun and gives out more light than 60,000 suns added together.

            Whereas, red supergiants are supergiant stars which are the largest stars in the universe in terms of physical size. These stars have very cool surface temperatures (3,227 – 4,227 degree Celcius), and enermous radii. The four largest known red supergiants in the Galaxy are Mu Cephei, KW Sagitarii, V354 Cephei,and KY Cygni which all have radii about 1500 times that of the sun (about 7 times as far as the Earth is from the sun). The radius of most red giants is between 200 and 800 times that of the sun, which is still enough to reach from the sun to Earth and beyond.



  1. The word designated in paragraph 2 has the same meaning with ....

    1. Termed
    2. Explained
    3. Energized
    4. Lightened
    Jawaban : a

    Designate = menunjuk, menandai, mengindikasikan

    Term: menyebut, mengistilahkan



  2.  The word it in paragraph 2 refers to ...

    1. Orion
    2. Sun
    3. Rigel
    4. Light
    Jawaban : c

    See the first sentence of the last paragraph.

  3. The word luminosity in paragraph 1 is closest in meaning to ...

    1. Brightness
    2. Heat
    3. Energy
    4. Strenght
    Jawaban : a

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  4. Paragraph 1 in the passage discusses about ...

    1. the largest supergiants in the world
    2. explanation about red supergiants
    3. description of the blue supergiants
    4. characteristics of supergiants
    Jawaban : d

    See the first sentence of the second paragraph.

  5. According to the passage, what is correct about red supergiants?

    1. There are only four red supergiants in the universe
    2. Their surfaces temperatures are between 20,000 – 50,0000C
    3. They are the largest stars in the universe in physical size
    4. Most of the stars have radii about 20 times that of the Sun
    Jawaban : a

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  6. Which of the following is NOT regarded as re supergiants?

    1. KY Cygni
    2. V354 Orion
    3. Mu Cephei
    4. KW Sagitarii
    Jawaban : b

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  7. The term ‘blue supergiants’ is used for the superstars which ...

    1. have radii abut 800 times of thet sun
    2. own mass of around 20 times that of the sun
    3. are the largest and brightest stars in the universe
    4. appear blue in colour and have enermous energy
    Jawaban : d

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