Instructions Competition Mode: For each correct answer, you get points based on how many other players get the question wrong. Your score is the sum of all correct answers.

Example: If you get a question correct that only 10% of all players get correct, you get 90 points for that question.

You can choose 5 questions to "Double". If you get it correct, your score is doubled for that question.

TIP: Easy questions aren't usually worth doubling since you are likely doubling a small number of points. You're better off doubling the hardest questions that you think you have correct (80 points possibly doubled is a lot better than 10 points definitely doubled).

You will not lose points for incorrect answers, so feel free to guess.

You can enter up to three group names, separated by commas, in the "Private Group" input. After you submit, when you view your results you can see the leaderboards for just your group(s). You will also get links you can share with others so they can play in those groups.
Feel free to create your own group name, such as your company or town, and pass the links along to friends, family, and coworkers.

Good luck!
    
 
Question #20: Astronomy: What term, from the Greek for "orbit", describes either of the two extreme points in the orbit of a planetary body about its primary body? For the earth's orbit around the sun, this single term includes its furthest distance (aphelion) and its nearest distance (perihelion).

Answer: apsides
There are two apsides in any elliptic orbit. Each is named by selecting the appropriate prefix, ap-/apo- (meaning "away from") or peri- (meaning "near") and adding the reference suffix of the primary body. For the sun this is -helion, while for the earth it is -gee, as in apogee and perigee. Other suffixes include ‑hermion for orbits of Mercury, -cythe for Venus, -aerion for Mars, and -jove for Jupiter.
All Submissions
Anahelion
Apex
apex
Apogee
Apogee
Apogee
Apogee
Apogee
Apogee
Apogee
apogee
apogee
apogee
Apsis
apsis
Arch
Astro
Axis
Elipses
Ellipse
Epihelion
Epogee
Helion
maxillus
peristalsis
Solstice
Solstice
syzygy
syzygy
Trajectory
troche
Zenith
zenith
zenith
Zyzygy
Score - 4.44%

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