Kepler's Laws Review

Front

What has an eccentricity of zero?

Back

A circle.

Front

An ellipse is drawn around two points called?

Back

Foci.

Front

According to Kepler's 2nd Law, Earth will sweep out an equal area in equal amounts of time. For this to be true, Earth must be...?

Back

Changing speed.

Front

Which term describes the time it takes for Earth to complete one circle around the sun?

Back

Orbital Period.

Front

Which ellipse has the highest eccentricity?

Back

Bottom.

Front

What is the shape of a perfect circle in terms of eccentricity?

Back

Eccentricity = 0.

Front

What are the two points located at the ends of the major axis of an ellipse called?

Back

Foci.

Front

What does Kepler's 1st Law state about planetary orbits?

Back

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

Front

What is the relationship between the semi-major axis and the orbital period according to Kepler's 3rd Law?

Back

The square of the orbital period is proportional to the cube of the semi-major axis.

Front

What is perihelion?

Back

The point in the orbit of a planet where it is closest to the Sun.