WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Extrusive rock
Common card · Science
Extrusive rock, a Common card
Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff.
- Rarity
- Common
- Domain
- Science
- ATK
- 48
- DEF
- 38
- Power
- 86
- Wikipedia reads a year
- 7,600
Power 86 (ATK + DEF): stronger than 30 % of WikiCards cards.
Extrusive rock quiz: 3 questions
Three questions on the Extrusive rock card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
In contrast, intrusive rock refers to rocks formed by magma which cools below the ______.
Answer
surface. In contrast, intrusive rock refers to rocks formed by magma which cools below the surface. From the Extrusive rock article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Annette. Annette 66 · Robert B. Leighton 59 · English auction 53 · Extrusive rock 48 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- In contrast, intrusive rock refers to rocks formed by magma which cools below the surface.
- The main effect of extrusion is that the magma can cool much more quickly in the open air or under seawater, and there is little time for the growth of crystals.
- Sometimes, a residual portion of the matrix fails to crystallize at all, instead becoming a natural glass like obsidian.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Extrusive rock article was read about 7,600 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 48 and blocks with 38: each hit it takes is cut by 15 %.
How to get Extrusive rock
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 Science cards
Cards close in power
The cards just above and just below Extrusive rock in the power ranking, all domains together.
- InstabilityCommon · Science · ATK 55 DEF 31
- Margaret Wotton, Marchioness of DorsetCommon · History · ATK 54 DEF 32
- AnnetteCommon · Society · ATK 66 DEF 20
- François-Adrien BoieldieuCommon · History · ATK 54 DEF 32
- Aziza al-YousefCommon · History · ATK 54 DEF 32
- Jacques DoucetCommon · Arts · ATK 49 DEF 37
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Extrusive rock (revision), CC BY-SA 4.0. Photo : Woudloper, CC BY-SA 3.0, Wikimedia Commons.
