Tests on rocks from the moon and on meteorites show that these are about 4.6 billion years old. But no one knows whether these are oldest rocks on Earth. The oldest Earth’s rocks tested thus far are about 3 1/3 billion years old. Scientists estimate the Earth’s age by measuring the ratios of various radioactive elements in rocks. On Earth, subsequent erosion and crustal motions have obliterated the craters that must have formed during this epoch. The lunar record indicates that the rate of impacts decreased to its present low level about 4 billion years ago. This same bombardment must have affected Earth as well. Studies of our moon, Mercury, Mars, and the large satellites of Jupiter and Saturn have provided ample evidence that all these large celestial bodies had formed. At percent, 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. We believe the Earth is about 4.6 billion years old. (8)- his education, he is thinking of (9)- with me. He comes and (7)- me in my shop on Sundays. My brother doesn’t want (5)- to university. I (2)- in London, I (3)- a brother and a sister. Contoh Soal Reading Comprehension Lengkap Beserta JawabanĬontoh Soal Reading Comprehension Lengkap Beserta Jawaban Contoh Soal Reading Comprehension Lengkap Beserta Jawaban Part 1Ĭhoose the correct answers to complete the following short passage.
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