AnswersLifetime Fitness 11th Grade EL2083 B – 202701Physical Activity and Flexibility

The Solar System Answers

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1
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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.
2
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Which describes one way that Aristarchus's explanation of the movement of objects in the sky was different from other scientists' earlier explanations?

A
He discovered Venus’s phases.
B
He argued that Earth rotates on its axis.
C
He explained the concept of retrograde motion.
D
He described the epicycles of the planets in the sky.
3

Look at the image of the solar system.

Question illustration
A
Earth
B
Jupiter
C
Mercury
D
Neptune
4

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.
5

Which two gaseous giants did Renaissance scientists such as Galileo know about?

A
Jupiter and Saturn
B
Mars and Neptune
C
Neptune and Uranus
D
Uranus and Saturn
6

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.
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

Which correctly lists three scientists who supported the heliocentric model of the solar system?

A
Aristotle, Ptolemy, Copernicus
B
Copernicus, Ptolemy, Kepler
C
Galileo, Kepler, Aristotle
D
Kepler, Galileo, Copernicus
9

Look at the diagram of the solar system.

Question illustration
A
orbit speed
B
the phases of Venus
C
retrograde motion
D
the rising of the Sun
10

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.

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