Earth Science Geology, the Environment, and the Universe

Section 1: The Formation of Our Solar System

Self-Check Quizzes-English

1
The objects that eventually formed planets by colliding and merging are called __________.
A)stars
B)asteroids
C)planetesimals
D)solar nebulae
2
Which describes the average distance between the Sun and Earth?
A)1 astronomical unit
B)1 mile
C)1 year
D)1 light year
3
The eccentricity of a perfect circle is __________ and a very elongated ellipse is __________.
A)zero, one
B)nearly zero, one
C)zero, nearly one
D)one, zero
4
What explains why the Sun governs the motion of all planets in our solar system?
A)the law of universal gravitation
B)Kepler's third law
C)retrograde motion of planets
D)telescopic observations of the planets
5
The figure illustrates Kepler's second law. Which conclusion can you draw from analyzing the purple areas “swept out” by the planet each month?
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A)The Sun is the center of the universe.
B)The shape of a planet's orbit is an ellipse.
C)Planets move faster when they are closer to the Sun and slower when they are farther away.
D)The speed of a planet's orbit steadily increases as it moves around the Sun.
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