SHEET MENT Part I1 Select the correct answer from the five choices given for cac
ID: 295332 • Letter: S
Question
SHEET MENT Part I1 Select the correct answer from the five choices given for cach of the following questions: 11.One explanation of why the planets near the Sun are composed mainly of rock and iron is that a) The Sun's magnetic field attracted all the iron in the young Solar System into b) The Sun is made mostly of iron. The gas ejected from its surface is therefore c) The Sun's heat made it difficult for other substances, such as ices and gases to d) The statement is false. The planets near the Sun contain large amounts of e) The Sun's gravitational attraction pulled iron and other heavy material the region around the Sun. iron, so that when it cooled and condensed, it formed iron-rich planets near the Sun condense near it. hydrogen gas and subsurface water inward and allowed the lighter material to float outward. 12. The Doppler-shift method for detecting the presence of exoplanets is best able to detect a) Massive planets near the star b) Massive planets far from the star. c) Low-mass planets near the star d) Low-mass planets far from the star. e) None of the above- we have never detected any exoplanets 13. Which of the following features is NOT shared by all of the terrestrial planets? a) A silicate mantle. b) An iron core. c) A strong magnetic field. d) Volcanic activity e) They share all of the above. 14. The low average densities of jupiter and Saturn compared with the Earth's suggest that? Jupiter and Saturn are hollow The gravitational attraction of Jupiter and Saturn has compressed their cores into a rare form of iron. Jupiter and Saturn contain large quantities of light elements, such as hydrogen and helium. a) b) c) d) Jupiter and Saturn are very hot Volcanic eruptions have ejected all the iron that was originally in Jupiter's and Saturn's cores. e)Explanation / Answer
11.(e)
The mercury is made of 2200 miles of iron core.
12.(c) low mass planets near the stars
It is used to observe the stars which are within range of160 light-years from Earth.
13. (b) iron core
Not necessary to have mettalic core.
14.(c)
Mass is not the factor ,due to the gas gaints its density is less.
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