Kepler's Laws

Planets orbit the Sun in a shape called a(n)

• circle

• ellipse

• focus

• perihelion

An ellipse is drawn around two points called

• aphelion

• perihelion

• foci

• axis

When a planet orbits the Sun, one of the foci of the elliptical orbit is 

• the axis

• the perihelion

• the center

• the Sun

Where is the planet moving faster

• Position A to B

• Position B to C

• Position H to I

• Position I to J

What has an eccentricity of zero

• a straight line

• a large ellipse

• a circle

• a small ellipse

What has an eccentricity of one

• a cigar shaped ellipse

• a large ellipse

• a circle

• a small ellipse

A planet moves __________ when it is farthest from the sun.

• faster

• slower

The time it takes for a planet to complete one orbit is called the

• orbital period

• sun year

• eccentricity

• planetary rotation

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 

• longer

• shorter

• 2.04 N

• 0.59 N

• 44

• 196 N