The formation of terrestrial-type of planets around a star is most likely to have occurred by what process? Accretion, or slow accumulation, of smaller particles by mutual gravitational attraction. Condensation of gas from the original star nebula. of a large disk of matter which formed around the star Capture of objects traversing the depths of space by the star. What do we mean by the frost line (also known as ice or snow line) when we discuss the formation of planets in the solar nebula? It is a circle at a particular distance from the Sun, beyond the temperature was low enough for ices to condense. It is another way of stating the temperature at which water freezes into ice. It marks the special distance from the Sun at which hydrogen compounds become abundant; closer to the sun , there are not hydrogen compounds It is the altitude in a planet’s atmosphere at which snow and ice can form. According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system? Because only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system Because gravity was stronger in the outer solar system, allowing more solid material to collect Because gas in the outer solar system contained a larger proportion of rock, metal and hydrogen compound than the gas in the inner solar system Because only the outer planets captured hydrogen and helium gas from the solar nebula. Why are the inner planets made of denser materials than the outer planets? The Sun’s gravity pulled denser materials toward the inner part of the solar nebula, while lighter gases escaped more easily. Denser materials were heavier and sank to the center of the nebula In the part of the nebula only metals and rocks were able to condense because of the high temperatures, whereas hydrogen compounds, although more abundant, were only able to condense in the cooler outer regions. When the solar nebula formed a disk, materials naturally segregated into bands, and in our particular solar system the dense materials settled nearer the Sun while lighter materials are found in the outer part.
The formation of terrestrial-type of planets around a star is most likely to have occurred by what process? Accretion, or slow accumulation, of smaller particles by mutual gravitational attraction. Condensation of gas from the original star nebula. of a large disk of matter which formed around the star Capture of objects traversing the depths of space by the star. What do we mean by the frost line (also known as ice or snow line) when we discuss the formation of planets in the solar nebula? It is a circle at a particular distance from the Sun, beyond the temperature was low enough for ices to condense. It is another way of stating the temperature at which water freezes into ice. It marks the special distance from the Sun at which hydrogen compounds become abundant; closer to the sun , there are not hydrogen compounds It is the altitude in a planet’s atmosphere at which snow and ice can form. According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system? Because only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system Because gravity was stronger in the outer solar system, allowing more solid material to collect Because gas in the outer solar system contained a larger proportion of rock, metal and hydrogen compound than the gas in the inner solar system Because only the outer planets captured hydrogen and helium gas from the solar nebula. Why are the inner planets made of denser materials than the outer planets? The Sun’s gravity pulled denser materials toward the inner part of the solar nebula, while lighter gases escaped more easily. Denser materials were heavier and sank to the center of the nebula In the part of the nebula only metals and rocks were able to condense because of the high temperatures, whereas hydrogen compounds, although more abundant, were only able to condense in the cooler outer regions. When the solar nebula formed a disk, materials naturally segregated into bands, and in our particular solar system the dense materials settled nearer the Sun while lighter materials are found in the outer part.