<human>:  When the Earth was formed, was the core molten?
<bot>: The Earth’s core is made of a mixture of molten metal and rocky material. The Earth’s core is also made of iron, nickel, and a few other metals. The core is very hot, and the heat comes from the radioactive decay of elements. The core is also very dense, which means that it is very heavy. The core is also very deep, which means that it is very far away from the surface of the Earth.