The Solar System Answers
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How did Kepler describe the planets’ orbits?
A
The planets’ orbits are circular.B
The planets’ orbits are elliptical.C
The planets and the Sun orbit Earth.D
The planets have miniature orbits called epicycles.
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How did Kepler’s discoveries contribute to astronomy?
A
They supported the heliocentric model.B
They established the laws of planetary motion.C
They explained how the Sun rises and sets.D
They made astronomy accessible to people who spoke Italian.4
What do comets and asteroids have in common?
A
They are made of ice.B
They orbit the Sun.C
They are made of metal debris.D
They are at the center of the solar system.5
Why was it difficult for people to accept a heliocentric concept of the solar system?
A
Scientists had no way to explain retrograde motion.B
Scientists did not check or confirm other scientists’ ideas.C
Information was published in Italian and people could not understand it.D
Aristotle was famous and his ideas were supported by religious teachings.6
Which idea was supported by Aristarchus, Copernicus, and Galileo?
A
The planets have epicycles.B
The planets revolve around the Sun.C
The stars rotate around the Sun.D
The center of the solar system is Earth.7
Which idea did Ptolemy’s model use to explain why the planets appeared to move backward as they moved in their orbits?
A
The planets spun in epicycles.B
The planets rotated on their axes.C
The planets revolved around the Sun.D
The planets were made of different materials.8
Why was Copernicus’s heliocentric model not believed until Galileo and Kepler provided more evidence?
A
The model had the moon orbiting Earth.B
The model was against religious teachings.C
The model could not explain retrograde motion.D
The model did not include all eight planets in the solar system.9
In addition to proposing that planetary orbits are elliptical, what other modification did Kepler make to Copernicus’s model?
A
Planets closer to the Sun move faster.B
Planets spin in an epicycle while orbiting Earth.C
Venus has phases due to its orbiting of the Sun.D
Earth’s rotation causes the rising and setting of the Sun.10
Look at the diagram of the solar system.
A
orbit speedB
the phases of VenusC
retrograde motionD
the rising of the SunDid you find these answers helpful?
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