The motion of an object going around another object in an orbit or elliptical course.
What is revolution?
100
The force of gravity between two objects will be greatest if their masses are _______ and the distance between them is _______.
What is large? What is small?
100
TWO PART QUESTION: This shape has an eccentricity of zero. This shape has an eccentricity of one.
What is a circle? What is a straight line?
100
As the distance between the foci increases, the shape of the ellipse becomes more _______.
What is eccentric?
200
This motion causes night and day.
What is rotation?
200
This motion causes a year.
What is revolution?
200
This law states that planets orbit the Sun in an elliptical pattern.
What is Kepler's 1st Law?
200
The point in a planet's orbit that is closer to the Sun.
What is perihelion?
200
The equation for eccentricity of an ellipse.
What is e=d/L?
300
The false belief that the Earth is in the center of the Universe.
What is Geocentric? What is Geocentrism?
300
The model with the Sun in the center of the solar system.
What is Heliocentrism?
300
Planets that are farther away from the Sun take ______ to orbit than planets that are closer to the Sun.
What is longer?
300
The point in a planet's orbit farthest away from the Sun.
What is aphelion?
300
This law states that the period of revolution (the time it takes to make one orbit) of a planet is related to a planet's distance from the Sun.
What is Kepler's 3rd Law?
400
This planet has the shape of a slightly eccentric ellipse.
What is Earth?
400
A natural satellite of a planet.
What is a moon?
400
This law states that planets closer to the Sun have a higher orbital speed. This law also states that planets farther from the Sun have a greater revolution period.
What is Kepler's 3rd Law?
400
The Sun is located at one of the ____ in a planet's orbit.
What is foci?
400
If the average distance between Earth and the Sun were doubled, the Sun's gravitational pull on Earth would _________ and Earth's period of revolution would ____________.
What is decrease? What is increase?
500
TWO PART QUESTION: Correctly described planetary motion. Correctly explained how and why planets move.
Who is Kepler? Who is Newton?
500
Term used to describe the shape of an ellipse.
What is eccentricity?
500
This law states that planets move faster when they are closer to the Sun and they move slower when they are father away from the Sun.
What is Kepler's 2nd Law?
500
This law states that all objects in the Universe are attracted to every other object. Their mass is directly related to the gravitational attraction and their distance is inversely related.
What is Newton's Universal Law of Gravitation?
500
This law states that planets sweep out equal areas in equal amounts of time on their elliptical orbit.