 <translate> Give some stream of consciousness and then the answer. The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70 % of the Moon's radius. It is composed of an iron -- nickel alloy and some light elements. The temperature at the inner core's surface is approximately 5,700 K (5,430 ° C), which is about the temperature at the surface of the Sun.

Based on this passage, what is believed to be the composition of earth's core? <yor> Fi ìmọ̀lára rẹ hàn, kó o sì wá dáhùn ìbéèrè náà. Apá tó wà nínú lọ́hùn-ún jù lọ nínú ayé ni àárín gbùngbùn ayé. Ó jẹ́ àpapọ̀ àpapọ̀ pẹ̀lú ààlà tó tó 1,220 kilometres (760 miles), èyí tó jẹ́ nǹkan bíi 70% ààlà Òṣùpá. Ó ní irin nínú, àdàkàdekè níkélì àti àwọn èròjà tó rọrùn láti lò. Ooru tó wà lábẹ́ òrùlé inú rẹ̀ tó nǹkan bí ẹgbẹ̀rún márùn-ún ó lé ẹ̀ẹ́dẹ́gbẹ̀rin [5,700] K (5,430 ° C), èyí tó fẹ́rẹ̀ẹ́ bá ooru tó wà lábẹ́ oòrùn mu.  Níbàámu pẹ̀lú ohun tó wà nínú ẹsẹ Bíbélì yìí, kí la gbà pé ó wà nínú ìsọ̀rí ilẹ̀ ayé? 