2. Chapter: The Solar System Table of Contents Section 3: The Outer Planets Section 1: The Solar System Section 2: The Inner Planets Section 4: Other Objects in the Solar System

10. Modern View of the Solar System 1 The Solar System

20. 1 Section Check Question 1 __________ gravity holds the solar system together. A. Earth’s B. Jupiter’s C. The Moon’s D. The Sun’s NC: 5.01, 5.03

21. 1 Section Check Answer The answer is D. Earth’s gravity holds the Moon in its orbit; the Sun’s gravity holds the solar system together. NC: 5.01, 5.03

22. 1 Section Check Question 2 The Sun, nine planets, and many smaller objects that orbit the Sun make up the _________. A. galaxy B. solar system C. inner planets D. outer planets NC: 5.01

23. 1 Section Check Answer The answer is B. The solar system also includes a huge volume of space. NC: 5.01

24. 1 Section Check Question 3 __________ developed the first Sun-centered model of the solar system. A. Euripides B. Copernicus C. Galileo D. Kepler NC: 5.04

25. 1 Section Check Answer The answer is B. Nicholas Copernicus published his Sun-centered model in 1543. NC: 5.04

54. 2 Section Check Question 1 Which planet is closest to the Sun? A. Mars B. Mercury C. Earth D. Venus NC: 5.01

55. 2 Section Check Answer The answer is B. Mercury is the closest planet to the Sun. Venus is the second planet from the Sun. NC: 5.01

56. 2 Section Check Question 2 Which planet has size and mass similar to Earth’s? A. Jupiter B. Mercury C. Pluto D. Venus NC: 5.01, 5.02

57. 2 Section Check Answer The answer is D. Venus has similar size and mass but the temperatures on its surface are between 450º C and 475º C. NC: 5.01, 5.02

58. 2 Section Check Question 3 Earth is the __________ planet from the Sun. A. second B. third C. fourth D. fifth NC: 5.01, 5.02, 5.05

59. 2 Section Check Answer The answer is B. Mercury and Venus are closer to the Sun than Earth. NC: 5.01, 5.02, 5.05

80. 3 Section Check Question 1 The fifth planet from the Sun is __________. A. Jupiter B. Neptune C. Saturn D. Pluto NC: 5.01

81. 3 Section Check Answer The answer is A. Jupiter is the largest planet in the solar system. NC: 5.01

82. 3 Section Check Question 2 Which of Jupiter’s large moons is closest to Jupiter and the most volcanically active object in the solar system? A. Callisto B. Europa C. Ganymede D. Io NC: 5.01

83. 3 Section Check Answer The answer is D. Jupiter exerts tremendous gravitational pull on Io. NC: 5.01

84. 3 Section Check Question 3 It takes Pluto __________ to orbit the Sun one time. A. 2 years B. 24 years C. 124 years D. 248 years NC: 5.01

85. 3 Section Check Answer The answer is D. During part of its orbit, Pluto is closer to the Sun than Neptune, but is still considered to be the ninth planet from the Sun. NC: 5.01

100. 4 Section Check Question 1 A __________ is composed of dust and rock particles mixed with frozen water, methane and ammonia. A. asteroid B. comet C. planet D. sun NC: 5.01

101. 4 Section Check Answer The answer is B. Some comets, such as Hale-Bopp, are named after the astronomers who discover them. NC: 5.01

102. 4 Section Check Question 2 Small pieces from a comet’s nucleus that spread out into a loose group are called ____________. A. asteroids B. meteorites C. meteoroids D. meteors NC: 5.01

103. 4 Section Check Answer The answer is C. A meteoroid that burns up in Earth’s atmosphere is called a meteor. NC: 5.01

104. 4 Section Check Question 3 What is a meteorite? Meteorites are meteoroids that strike Earth. Answer NC: 5.01

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106. End of Chapter Summary File