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### 15 Cards in this Set

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 The clearly different size classes of objects in our solar system are: the Sun, the Jovian planets and the Terrestrial planets. Yes. About a factor of ten difference in sizes. 14.11 The large objects in our solar system come in in just three size categories, with the Sun as one of them. Yes. The Jovian planets and the Terrestrial planets are the other two. 14.12 Within the Solar system, the size ratio between the largest object in one category and the largest object in the next is close to 10. Yes. The Sun is about 10 times the size of Jupiter, which is about 10 times the size of the Earth. 14.13 The Sun is approximately one hundred times the size of the Earth. Yes. Ten times the size of Jupiter, which is ten times the size of the Earth. 14.14 The density of water is 1000kg/m3 while the density of iron is 7800kg/m3. Which of the following values is a plausible value for the density of a terrestrial planet? 5000kg/m3 Yes. Rock and iron. 14.21 The density of rock is about 3000kg/m3. The density of the Earth is greater than 3000kg/m3 because the Earth has an iron core. Yes. A little iron, with a density of 7800kg/m3 adds a lot of mass. 14.22 Which of the following statements about the moons of terrestrial planets is currently accepted? they sometimes capture moons by accident. Yes. Mars is one example. Earth is more complicated, but still an accident. 14.23 Which of the following three systems is regarded as the most normal for a terrestrial planet? Venus, with no moons at all. Yes. Typically, terrestrial planets do not have moons. 14.24 The density of water is 1000kg/m3 while the density of rock is 3000kg/m3. Which of the following values is a plausible value for the density of a jovian planet? 700kg/m3 Yes. Actually that is the density of Saturn. 14.31 The density of rock is about 3000kg/m3. The densities of the jovian planets are less than 3000kg/m3 because they are mostly gas. Yes. Some, like Jupiter, are thought to have rocky cores. 14.32 The jovian planets typically have large systems of moons. Yes. Each has a miniature solar system of objects. 14.33 Asteroids are made of rock and iron. Yes. Some asteroids are rock, some are iron, some are both. 14.41 Comets are made of ice and frozen gas. Yes. Sometimes called a 'dirty snowball'. 14.42 The Asteroid Belt lies between the orbits of Mars and Jupiter. Yes. That is where most of the asteroids are 14.43 The paths of comets usually extend far beyond the orbit of Pluto. Yes. Only a few of them get captured into orbits smaller than that. 14.44