L7.1 Planetary Motion and Gravitation

In ancient times, what was assumed to revolve around Earth?

• Only the Moon

• Only the Sun

• The Sun, the Moon, the planets, and the stars

• Only the planets

Which of the following best describes Kepler's First Law?

• All planets orbit around the Sun in a path described by a circle with the Sun at the center.

• All planets orbit around the Sun in a path described by an ellipse with the Sun at one of its two foci.

• All planets orbit around the Sun in a path described by a parabola with the Sun at one of its two foci.

• All planets orbit around the Sun in a path described by a hyperbola with the Sun at the center.

What does Kepler's Second Law state?

• An imaginary line joining a planet and the Sun sweeps out equal areas in equal time intervals.

• An imaginary line joining a planet and the Sun sweeps out unequal areas in equal time intervals.

• An imaginary line joining a planet and the Sun sweeps out equal areas in unequal time intervals.

• An imaginary line joining a planet and the Sun sweeps out unequal areas in unequal time intervals.

Tags

NGSS.HS-ESS1-4

According to Kepler's Third Law, what is the relationship between the periods of two planets and their average distances from the Sun?

• The square of the ratio of the periods of any two planets revolving around the Sun is equal to the square of the ratio of their average distances from the Sun.

• The cube of the ratio of the periods of any two planets revolving around the Sun is equal to the square of the ratio of their average distances from the Sun.

• The square of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distances from the Sun.

• The cube of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distances from the Sun.

Tags

NGSS.HS-ESS1-4

Which law states that the gravitational force between any two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers?

• Kepler’s First Law

• Kepler’s Second Law

• Law of universal gravitation

• Gravitational force

Tags

NGSS.HS-PS2-4

Which law states that an imaginary line from the Sun to a planet sweeps out equal areas in equal time intervals?

• Kepler’s First Law

• Kepler’s Second Law

• Kepler’s Third Law

• Law of universal gravitation

Tags

NGSS.HS-ESS1-4

Which term describes the force of attraction between two objects that is proportional to the objects’ masses?

• Kepler’s First Law

• Kepler’s Second Law

• Gravitational force

• Law of universal gravitation

Tags

NGSS.HS-PS2-4

Which law states that the paths of the planets are ellipses, with the Sun at one focus?

• Kepler’s First Law

• Kepler’s Second Law

• Kepler’s Third Law

• Law of universal gravitation

Which law states that the square of the ratio of the periods of any two planets revolving about the Sun is equal to the cube of the ratio of their average distances from the Sun?

• Kepler’s First Law

• Kepler’s Second Law

• Kepler’s Third Law

• Law of universal gravitation

Tags

NGSS.HS-ESS1-4

In Kepler's Third Law, what does the variable T represent?

• The distance between the planet and the sun

• The orbital period of the planet

• The mass of the planet

• The radius of the planet

Tags

NGSS.HS-ESS1-4