Eccentricity

A perfect circle has 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 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

Calculate the eccentricity for the following orbit.

• 1.600

• 0.800

• 0.600

• 1.200

If an orbit has an eccentricity value of "0", what shape is it? 

• perfectly circular
• perfectly flat
• very oval/elliptical
• slightly oval/elliptical

Which orbit is most eccentric? 

• 1
• 3
• 4
• 5

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

During which month is the earth moving the slowest? 

• July 
• March
• January
• September

During what month is the earth moving the fastest around the sun? 

• July
• March
• January
• September