WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Nature cards · Crater counting
Common card · Nature
Crater counting, a Common card
Crater counting is a method for estimating the age of a planet or moon's surface based upon the assumptions that when a piece of planetary surface is new, then it has no impact craters, impact craters accumulate after that at a rate that is assumed known.
- Rarity
- Common
- Domain
- Nature
- ATK
- 61
- DEF
- 37
- Power
- 98
- Wikipedia reads a year
- 2,400
Power 98 (ATK + DEF): stronger than 55 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Consequently, counting how many craters of various sizes there are in a given area allows determining how long they have accumulated and, consequently, how long ago the surface has formed.
- The method has been calibrated using the ages obtained by radiometric dating of samples returned from the Moon by the Luna and Apollo missions.
- It has been used to estimate the age of areas on Mars and other planets that were covered by lava flows, on the Moon of areas covered by giant mares, and how long ago areas on the icy moons of Jupiter and Saturn flooded with new ice.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Crater counting article was read about 2,400 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 61 and blocks with 37: each hit it takes is cut by 15 %.
How to get Crater counting
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Nature cards
Cards close in power
The cards just above and just below Crater counting in the power ranking, all domains together.
- List of diplomatic missions in HondurasCommon · Science · ATK 49 DEF 49
- Supyire languageCommon · Society · ATK 65 DEF 33
- Alexander KhokhlachevCommon · Society · ATK 63 DEF 35
- Amateur radio homebrewCommon · Science · ATK 53 DEF 45
- Ban Hin TaekCommon · Society · ATK 58 DEF 40
- Briar Grace-SmithCommon · Arts · ATK 58 DEF 40
Card lists
- All cards from A to ZEvery card, by name
- Nature cards600 cards
- Science cards600 cards
- History cards600 cards
- Arts cards600 cards
- Society cards600 cards
- Tier listS and A tiers by power (ATK + DEF)
- Legendary cards136 cards
- Epic cards262 cards
- Strongest cardsTop 100 by attack
Credits
Text : Wikipedia, Crater counting (revision), CC BY-SA 4.0. Photo : NASA/Context Camera (CTX)/modified by Chmee2, Public domain, Wikimedia Commons.
