Kepler's Law

What does Kepler's 2nd Law state? 

• during a planet's orbit, the planet will sweep out equal areas in its orbit in equal amounts of time

• all areas are equal in space

• triangles have equal areas

• no two points in a planet's orbit are equal

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NGSS.HS-ESS1-4

Kepler's 2nd Law deals with 

• the shape of the planets' orbits

• the speed/area the planet travels 

• the length of time it takes the planet to orbit the sun

Kepler's first law states that the orbits of the planets are oval in shape or 

• ellipses

• perfect circles

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NGSS.HS-ESS1-4

The path a planet travels around the sun is called its 

• orbit

• ellipse

• barycenter

• precession

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NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Which diagram shows a planet with the least eccentric orbit?

• 1

• 2

• 3

• 4

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NGSS.HS-ESS1-4

What is eccentricity? 

• a measurement of how elliptical an orbit is. 

• a measurement of the distance between the planet and the sun

• a measurement of how long the planet takes to rotate around the sun

• none of these

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NGSS.HS-ESS1-4

During which month is the earth moving the slowest? 

• July 

• March

• January

• September

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NGSS.HS-ESS1-4

What does Kepler's 3rd Law state?

• The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.

• The planets move in perfect circles around the sun.

• The speed of a planet is constant throughout its orbit.

• The planets are stationary.

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NGSS.HS-ESS1-4

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

• Planets move in elliptical orbits with the Sun at one focus.

• Planets move in circular orbits with the Sun at the center.

• Planets move in parabolic orbits.

• Planets move in hyperbolic orbits.

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NGSS.HS-ESS1-4

According to Kepler's Second Law, when is a planet moving fastest in its orbit?

• When it is closest to the Sun (perihelion).

• When it is farthest from the Sun (aphelion).

• When it is at the midpoint of its orbit.

• When it is at the same distance from the Sun as Earth.

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NGSS.HS-ESS1-4