English to Spanish Science Geology earth, solar system, heat of Earth's core

Although potassium might make up only 0.1 per cent of the Earth's core, 'it can be enough to provide one-fifth of the heat given off by the Earth'

The Earth is thought to have formed from the collision of many rocky asteorids, perhaps hundreds of kilometres in diameter, in the early solar system. As the proto-Earth gradually bulked up, continuing asteroid collisions and gravitational collapse kelpt the planet molten. Heavier elements -in particular iron- would have sunk to the core in 10 to 100 million years' time, carrying with it other elements that bind to iron.