within the frost line, planetesimals were composed of rock and metal, but not hydrogen compoundsmauritania pronunciation sound

1. How do these meteorites support our theory about how the terrestrial planets formed?The meteorites' appearance and composition is just what we'd expect if metal and rock condensed and accreted as our theory suggests.According to our present theory of solar system formation, which of the following statements about the growth of terrestrial and jovian planets is not true?The jovian planets began from planetesimals made only of ice, while the terrestrial planets began from planetesimals made only of rock and metal.What is the primary reason we divide the ingredients of the solar nebula into four categories (hydrogen/helium gas; hydrogen compound; rock; metal)?The temperature at which these materials condense into a solid varies considerably.According to our theory of solar system formation, which law best explains why the solar nebula spun faster as it shrank in size?According to our theory of solar system formation, which law best explains why the central regions of the solar nebula got hotter as the nebula shrank in size?About 2% of our solar nebula consisted of elements heavier than hydrogen and helium. Within the frost line, bits of rock and metal clumped together to make planetesimals. Which one counts as an "exception to the rule" in being unusual for our solar system?Which of the following is not a major difference between the terrestrial and jovian planets in our solar system?Terrestrial planets contain large quantities of ice, and jovian planets do not.Which of the following is not a major pattern of motion in the solar system?Nearly all comets orbit the Sun in same direction and roughly the same plane.In what way is Pluto more like a comet than a planet?Considering only the tilt of their axis, which planet listed below would have the most extreme seasons?Mars has two moons that are most similar in character to ________.How is Einstein's famous equation, E = mc2, important in understanding the Sun?The Sun generates its energy by converting 4 million tons of mass to energy each second.Compared to the distance between Earth and Mars, the distance between Jupiter and Saturn is ________.Which of the following procedures would allow you to make a spectrum of the Sun similar to the one shown, though with less detail?In the illustration of the solar spectrum, the upper left portion of the spectrum shows the __________ visible light.Which of the following best describes why the Sun's spectrum contains black lines over an underlying rainbow?The Sun's hot interior produces a continuous rainbow of color, but cooler gas at the surface absorbs light at particular wavelengths.Notice that the Sun's spectrum appears brightest (or most intense) in the yellow-green region.

This fact tells us __________.Suppose we want to know what the Sun is made of. Consolidations of these rocky planetesimals formed the four small, dense inner, or terrestrial, planets—Mercury, Venus, Earth, and Mars. The only solid particles were made of metal and rock.

How many of the planets orbit the Sun in the same direction that Earth does?What fraction of the moons of the planets orbit in the same direction that their planets rotate?Which of the following did not occur during the collapse of the solar nebula?Which lists the major steps of solar system formation in the correct order?Why didn't a terrestrial planet form at the location of the asteroid belt?Jupiter's gravity kept planetesimals from accreting.What's the leading theory for the origin of the Moon?It formed from the material ejected in a giant impact.Visual Activity: Condensed Materials in Different Regions of the Disk of the Forming Solar System :A.Rocks, Metals, Hydrogen Compounds, Hydrogen, and Helium, all in gaseous formSuppose you find a rock that contains some potassium-40 (half-life of 1.3 billion years). False. In astronomy or planetary science, the frost line, also known as the snow line or ice line, is the particular distance in the solar nebula from the central protostar where it is cold enough for volatile compounds such as water, ammonia, methane, carbon dioxide, carbon monoxide to condense into solid ice grains. Which of the following statements is most likely to have been true about these first-generation stars?Planets were likely very rare or non-existent around these first-generation stars.The following statements are all true. The frost line separates terrestrial planets from jovian planets (gas giants). You measure the amount and determine that there are 9 grams of potassium-40 in the rock. How old is the rock?Which of the following puzzles in the solar system cannot be explained by a giant impact event?The orbit of Triton in the opposite direction to Neptune's rotation

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