Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Ya ƙunshi da farko daga dutsen silicate da baƙin ƙarfe, Io yana kusa da haɗin gwargwadon abubuwan duniya fiye da sauran tauraron dan adam a cikin tsarin hasken rana na waje, wanda galibi ya ƙunshi cakuda ruwan kankara da silicates. Io yana da nauyin 3.5275 g / cm3, mafi girma daga kowane wata a cikin hasken rana; ya fi girma fiye da sauran tauraron dan adam na Galilean (Ganymede da Callisto musamman, wanda yawansa ya kai 1.9 g / cm3) kuma dan kadan ya fi girma (~ 5.5%) fiye da wata na 3.344 g / cm3. Samfura bisa ga Voyager da Galileo ma'aunin taro na Io, radius, da coefficients na nauyi na quadrupole (ƙimar adadi da ke da alaƙa da yadda aka rarraba taro a cikin wani abu) ya nuna cewa an bambanta cikinsa tsakanin ƙarancin silicate da rufi da baƙin ƙarfe- ko baƙin ƙarfe-sulfide-mai wadataccen tsakiya. Cibiyar ƙarfe ta Io tana da kusan kashi 20% na yawanta. Dangane da adadin sulfur a cikin tsakiya, tsakiya tana da radius tsakanin 350 da 650 km (220 <unk> 400 mi) idan an hada shi kusan gaba ɗaya da baƙin ƙarfe, ko tsakanin 550 da 900 km (340 <unk> 560 mi) don tsakiya wanda ya ƙunshi cakuda baƙin ƙarfe da sulfur. Magnetometer na Galileo ya kasa gano wani yanki na ciki, na ciki a Io, yana nuna cewa zuciyar ba ta haɗuwa ba. Samfurin kayan ciki na Io ya nuna cewa murfin ya ƙunshi aƙalla kashi 75% na ma'adinai mai wadataccen magnesium, kuma yana da babban abun da ke kama da na L-chondrite da LL-chondrite meteorites, tare da ƙarfe mafi girma (idan aka kwatanta da silicon) fiye da wata ko Duniya, amma ƙasa da Mars. Don tallafawa kwararar zafin da aka lura akan Io, 10<unk>20% na mayafin Io na iya narkewa, kodayake yankuna inda aka lura da zazzabi mai zafi mai zafi na iya samun ƙananan ɓangarorin narkewa. Koyaya, sake nazarin bayanan magnetometer na Galileo a cikin 2009 ya bayyana kasancewar filin maganadisu a Io, wanda ke buƙatar tekun magma 50 km (31 mi) a ƙarƙashin farfajiyar. Ƙarin bincike da aka buga a shekara ta 2011 ya ba da tabbacin kai tsaye na irin wannan teku. An kiyasta wannan Layer ya zama kilomita 50 mai kauri kuma ya zama kusan kashi 10% na Io...  Tambaya: Nawa ne ainihin lo ya zama taro?
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