Why does the speed of a planet decrease as it moves away from the sun?(1 point)
Responses
The planet’s inertia begins to point inward toward the sun.
The planet’s inertia begins to point inward toward the sun.
The sun’s gravitational pull on the sun decreases.
The sun’s gravitational pull on the sun decreases.
The direction of the sun’s pull relative to the planet’s motion changes.
The direction of the sun’s pull relative to the planet’s motion changes.
The planet’s inertia begins to point backward along its orbit.
The direction of the sun's pull relative to the planet's motion changes.
Select the correct answer to complete the sentence. Gravitational force is said to be universal because:(1 point)
Responses
it operates in one direction.
it operates in one direction.
it applies mainly to planets and moons.
it applies mainly to planets and moons.
it applies to all objects.
it applies to all objects.
it operates only within our solar system.
it applies to all objects.
Which of the eight planets in the solar system has the most elliptical orbit?(1 point)
Responses
Venus
Venus
Mercury
Mercury
Mars
Mars
Earth
Mars
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 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.
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.
Johannes Kepler and Isaac Newton worked together to define gravity as a force on Earth.
Isaac Newton described the existence of gravitational force mathematically, but he built upon the ideas of other scientists before him.
Drag each item to the correct location, so that each contribution to the theory of universal gravitation is matched with the scientist responsible for it. (2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Johannes Kepler Robert Hooke Isaac Newton
Johannes Kepler - Developed the laws of planetary motion based on observations and mathematical calculations.
Isaac Newton - Described the existence of gravitational force mathematically and developed the theory of universal gravitation.
Robert Hooke - Proposed the concept of an inverse square law for gravitational force, although his work was overshadowed by Newton's contributions.
Drag each item to the correct location.(2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Geocentric Model Heliocentric Model