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Pertanyaan

Questions 57 - 60 are based on the following text.


    We believe the Earth is about 4.6 billion years old. At present we are forced to look to other bodies in the solar system for hints as to what the early history of the Earth was like. Studies of our moon, Mercury, Mars, and the large satellites of Jupiter and Saturn have provided ample evidence that all these large celestial bodies were bombarded by smaller objects in a wide variety of sizes shortly after the larger bodies had formed. This same bombardment must have affected Earth as well. The lunar record indicates that the rate of impacts decreased to its present low level about 4 billion years ago. On Earth, subsequent erosion and crustal motions have obliterated the craters that must have formed during this epoch.

    Scientists estimate the Earth's age by measuring the ratios of various radioactive elements in rocks. The oldest Earth's rocks tested thus far are about 3 1/3 billion years old. But no one knows whether these are oldest rocks on Earth. Tests on rocks from the moon and on meteorites show that these are about 4.6 billion years old. Scientists believe that this is the true age of the solar system and probably the true age of the Earth.

Source: education.kulichki.net/lang/toread4.html

According to this passage, how do scientists estimate the age of the Earth?

According to this passage, how do scientists estimate the age of the Earth?

  1. By measuring the ratios of radioactive elements in rocks.

  2. By examining fossils.

  3. By studying sunspots.

  4. By examining volcanic activity.

  5. By measuring the weight of the rocks.

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Jawaban terverifikasi

Jawaban

jawaban yang benar adalah A.

jawaban yang benar adalah A.

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Pembahasan

Jawaban yang benar adalah A. Soal menanyakan "Berdasarkan teks, bagaimana para peneliti mengestimasi usia Bumi?". Informasi tersebut ada di paragraf ke dua pada kalimat "Scientists estimate the Earth's age by measuring the ratios of various radioactive elements in rocks." artinya "Para ilmuan memperkirakan usia bumi dengan mengukur rasio berbagai unsur radioaktif dalam batuan." Dengan demikian, diketahui bahwa para peneliti mengestimasi usia Bumi dengan mengukur rasio elem radio aktif pada batuan (By measuring the ratios of radioactive elements in rocks). Jadi, jawaban yang benar adalah A.

Jawaban yang benar adalah A.

Soal menanyakan "Berdasarkan teks, bagaimana para peneliti mengestimasi usia Bumi?".

Informasi tersebut ada di paragraf ke dua pada kalimat "Scientists estimate the Earth's age by measuring the ratios of various radioactive elements in rocks." artinya "Para ilmuan memperkirakan usia bumi dengan mengukur rasio berbagai unsur radioaktif dalam batuan."

Dengan demikian, diketahui bahwa para peneliti mengestimasi usia Bumi dengan mengukur rasio elem radio aktif pada batuan (By measuring the ratios of radioactive elements in rocks).

Jadi, jawaban yang benar adalah A.

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