Question

Drag each item to indicate whether it is related to Aristotle's or Ptolemy's model of the solar system, or to both. Some items may be used twice.(2 points)

Aristotle's Model Ptolemy's model

geocentric

planets fixed on epicycles

planets fixed on nested spheres

accurately predicted the positions of the planets

Answer 1

Select the correct answer to complete the sentence. Gravitational force is said to be universal because:(1 point)
Responses

it applies mainly to planets and moons.
it applies mainly to planets and moons.

it operates only within our solar system.
it operates only within our solar system.

it operates in one direction.
it operates in one direction.

it applies to all objects.

Answer 2

Why does the speed of a planet decrease as it moves away from the sun?(1 point)
Responses

The sun’s gravitational pull on the sun decreases.
The sun’s gravitational pull on the sun decreases.

The planet’s inertia begins to point backward along its orbit.
The planet’s inertia begins to point backward along its orbit.

The planet’s inertia begins to point inward toward the sun.
The planet’s inertia begins to point inward toward the sun.

The direction of the sun’s pull relative to the planet’s motion changes.

Answer 3

Which of the eight planets in the solar system has the most elliptical orbit?(1 point)
Responses

Earth
Earth

Mars
Mars

Mercury
Mercury

Venus

Answer 4

Newton and the Law of Universal Gravitation Quiz
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Question
Which statement about the development of Newton's theory of universal gravitation is correct?(1 point)
Responses

The ideas of scientists such as Nicolaus Copernicus and Robert Hooke contradicted Newton's theory of universal gravitation.
The ideas of scientists such as Nicolaus Copernicus and Robert Hooke contradicted Newton's theory of universal gravitation.

Isaac Newton was the first scientist to propose the idea that gravity increases as distance between objects decreases.
Isaac Newton was the first scientist to propose the idea that gravity increases as distance between objects decreases.

Isaac Newton described the existence of gravitational force mathematically, but he built upon the ideas of other scientists before him.
Isaac Newton described the existence of gravitational force mathematically, but he built upon the ideas of other scientists before him.

Johannes Kepler and Isaac Newton worked together to define gravity as a force on Earth.

Answer 5

Newton and the Law of Universal Gravitation Quiz
8 of 88 of 8 Items
Question
Why was the Copernican model a controversial proposition? Select the three correct answers.(2 points)
Responses

It demoted Earth to just another planet.
It demoted Earth to just another planet.

It contradicted religious doctrine of the time.
It contradicted religious doctrine of the time.

It was a complex model.
It was a complex model.

It contradicted established scientific understanding.
It contradicted established scientific understanding.

It was not supported by observations.
It was not supported by observations.

It was mostly incorrect.