Eccentricity

A perfect circle has an eccentricity of ______.

• 0
• .99
• 1
• 2

The flattest ellipse before it becomes a line will have an eccentricity of _______.

• 0
• .99
• 1
• 2

The period of the earth's orbit around the sun is ____.

• 1 day
• 1 year
• 24 hours
• 364 hours

Which planet has an orbital eccentricity most like the orbital eccentricity of the Moon?

• Earth
• Saturn
• Mars
• Mercury

The gravitational attraction between the star and the planet will be greatest at position 

• A
• B
• C
• D

The length of an Earth day is determined by the time required for approximately one 

• Earth rotation
• Earth revolution
• Sun rotation
• Sun revolution

Which planet takes more time to complete one rotation on its axis than to complete one revolution around the Sun?

• Mercury
• Venus
• Mars
• Jupiter

Which list shows four planets of the solar system in order from smallest to largest?

• Jupiter, Saturn, Uranus, Neptune
• Neptune, Uranus, Saturn, Jupiter
• Saturn, Jupiter, Neptune, Uranus
• Uranus, Neptune, Saturn, Jupiter

Which diagram shows a planet with the least eccentric orbit?

• 1
• 2
• 3
• 4

What is the maximum eccentricity an ellipse can be?

• 0
• .5
• 1
• 42