Most of the mass in the Milky Way Galaxy is located
A) in the gas and dust.
B) in the halo (above/below the disk).
C) in the central bulge of the galaxy.
D) within the disk.
E) in the stars in the spiral arms.
Question 2According to the universal law of gravitation, the force due to gravity is
A) not dependent on the distance between objects.
B) directly proportional to the distance between objects.
C) directly proportional to the square of the distance between objects.
D) inversely proportional to the distance between objects.
E) inversely proportional to the square of the distance between objects.
Question 3Which of the terrestrial worlds has the strongest magnetic field?
A) the Moon B) Mercury C) Earth D) Mars E) Venus
Question 4Which of the following correctly lists speeds from slowest to fastest?
A) Earth's speed of revolution about the Sun, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us
B) Earth's speed of rotation on its axis, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of revolution about the Sun, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us
C) the speed of our solar system orbiting the center of the Milky Way Galaxy, Earth's speed of revolution about the Sun, Earth's speed of rotation on its axis, the speeds of very distant galaxies relative to us, typical speeds of stars in the local solar neighborhood relative to us
D) Earth's speed of revolution about the Sun, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, typical speeds of stars in the local solar neighborhood relative to us, the speeds of very distant galaxies relative to us
E) the speeds of very distant galaxies relative to us, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, Earth's speed of revolution about the Sun, the speed of our solar system orbiting the center of the Milky Way Galaxy
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