Eccentricity of Orbital Forces

Eccentricity of Orbital Forces

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Multiple Choice

What is an eccentricity?

• The flat shape of a square

• The roundness of an ellipse

Multiple Choice

How many foci are in an ellipse?

• 1

• 2

• 3

Multiple Choice

What is the shape of the planets orbits around the sun?

• Perfect Circle

• Square

• Ellipse

• Straight line

Multiple Choice

What is located at one of the foci?

• Moon

• Sun

• Mars

• Asteroid

Multiple Choice

As eccentricity decrease the ellipse becomes more

• circular

• oval

Multiple Choice

Kepler's 2nd Law states that

• Planet changes speed as it orbits around the sun: faster when closer to the sun, slower when farther from the sun

• Planet does NOT change speed as it orbits around the sun

• Planet changes speed as it orbits around the sun: slower when closer to the sun, faster when farther from the sun

Multiple Choice

Why does a planet move faster when it is closer to the sun then when it is further?

• The planet's gravitational pull

• The sun's gravitational pull

• The moon's gravitational pull