21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 7, Problem 3QP
To determine
Select the correct option for the terrestrial planets formed.
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Which of the following observations would support the solar nebula theory over the passing star hypothesis?
a.
Proving that most of the sun-like stars near the sun also have planets orbiting them.
b.
Proving that none of the stars near the sun has planets orbiting them.
c.
Finding a planet located beyond the orbit of Pluto.
d.
Finding a meteorite whose age proved to be greater than 4.6 billion years.
e.
Proving that Mercury has the same uncompressed density as Earth.
3. Why are the inner planets made of denser materials than the outer planets?
The dust in the dust clouds in intersteller space consists of?
a. atomic gas
b. molecular gas
c. tiny solid grains
d. pieces of ice ranging from several meters to a kilometer in diameter
Chapter 7 Solutions
21st Century Astronomy
Ch. 7.1 - Prob. 7.1CYUCh. 7.2 - Prob. 7.2CYUCh. 7.3 - Prob. 7.3CYUCh. 7.4 - Prob. 7.4CYUCh. 7.5 - Prob. 7.5CYUCh. 7 - Prob. 1QPCh. 7 - Prob. 2QPCh. 7 - Prob. 3QPCh. 7 - Prob. 4QPCh. 7 - Prob. 5QP
Ch. 7 - Prob. 6QPCh. 7 - Prob. 7QPCh. 7 - Prob. 8QPCh. 7 - Prob. 9QPCh. 7 - Prob. 10QPCh. 7 - Prob. 11QPCh. 7 - Prob. 12QPCh. 7 - Prob. 13QPCh. 7 - Prob. 14QPCh. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Prob. 17QPCh. 7 - Prob. 18QPCh. 7 - Prob. 19QPCh. 7 - Prob. 20QPCh. 7 - Prob. 21QPCh. 7 - Prob. 22QPCh. 7 - Prob. 23QPCh. 7 - Prob. 24QPCh. 7 - Prob. 25QPCh. 7 - Prob. 26QPCh. 7 - Prob. 27QPCh. 7 - Prob. 28QPCh. 7 - Prob. 29QPCh. 7 - Prob. 30QPCh. 7 - Prob. 31QPCh. 7 - Prob. 32QPCh. 7 - Prob. 33QPCh. 7 - Prob. 34QPCh. 7 - Prob. 35QPCh. 7 - Prob. 36QPCh. 7 - Prob. 37QPCh. 7 - Prob. 38QPCh. 7 - Prob. 39QPCh. 7 - Prob. 40QPCh. 7 - Prob. 41QPCh. 7 - Prob. 42QPCh. 7 - Prob. 43QPCh. 7 - Prob. 44QPCh. 7 - Prob. 45QP
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- 22. The Solar SystemA. formed about 14 billion years ago.B. formed about 4.5 billion years ago.C. formed about 100,000 years ago.D. has always existedarrow_forward20 Approximately how many other planetary systems have been discovered to date? A Tens of thousands B) Tens C Hundreds D Thousands E Millionsarrow_forwardOur Solar System consist of two distinctly different types of planets. A. Describe how these planets differ in their general characteristics. B. Explain the cause of these differencesarrow_forward
- Question #4: According to the nebular theory, which planet is most likely to be gaseous rather than rocky? A. Venus, because it is the warmest planet and so is more likely to be gaseous B. Mercury, because planets closer to the solar nebula are more likely to be made of gas, like the nebula C. Earth, because the atmosphere consists of nitrogen, oxygen, and other gases, so it is a gaseous planet D. Neptune, because as the planets get farther from the solar nebula, their composition is more icy and gaseous e Education TM Inc. RK12arrow_forwardWhen tidal bulges are NOT in a direct Earth-moon line but slightly ahead of the moon, a. Earth’s gravity weakens. b. their gravitational field pulls the moon forward in its orbit, causing it to recede from Earth. c. their gravitational field pulls the moon back in its orbit, causing the moon to fall toward Earth. d. Earth’s gravity strengthens, causing the moon to orbit faster. e. the tidal bulges have no effect on the moon.arrow_forwardSome planets have very strong magnetic fields. What features must a planet have to cause this? a.both rapid rotation and a conducting liquid core b.only a rapid rotation c.only a liquid conducting core d.both a rapid rotation and a solid metallic core e.only a metallic corearrow_forward
- Question #2: Which statement correctly describes a difference in our solar system's inner planets and outer planets due to gravitational effects? A. The inner planets are larger. B. The outer planets have more moons. C. The inner planets are more spread apart. D. The outer planets all have rocky surfaces. ucation TM Inc. BK2arrow_forwardSurprisingly, the New Horizons probe took pictures of Pluto and found a. ongoing volcanic eruptions b. mountain ranges c. lakes of methane d. a lot of impact craters Pluto and other "dwarf planets" are not considered proper planets because a. they don't have any moons b. they are members of belts like the asteroid and Kuiper belts c. they don't have atmospheres d. their orbital inclinations are too high e. their orbits are too eccentric Which of these planets has never had an artificial satellite? a. Neptune b. Saturn c. Mars d. Jupiter e. Venusarrow_forwardWhich of the following statements accurately describes our current understanding of the solar system? a. There are no metals in the solar system beyond Jupiter and its orbit. b. Terrestrial worlds are so small because their large atmospheres were stripped away in time by Jupiter. c. Jupiter and Saturn are made of strictly a combination of hydrogen and helium, and both objects lack a planetary core. d. Various ices can contribute to the mass of planetary cores if we are at a great enough distance from the sun.arrow_forward
- 5. The nebular theory of the formation of the solar system successfully predicts all but one of the following. Which one does the theory not predict?arrow_forwardWhy does the solar nebula theory predict that planetary systems are common?arrow_forward19 A planet is detected via the Doppler technique. The velocity change of the star is a measure of A The planet's size and density. B C D E The planet's mass and orbital distance. The planet's orbital period and eccentricity. The planet's mass and composition. The planet's size and orbital distance.arrow_forward
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