Final answer:
Radioactive decay of elements like 238U and 40K is responsible for half of Earth's core heat.
Explanation:
Radioactive decay of elements such as 238U and 40K accounts for about half of the heat generated by Earth's core. The energy produced by these decays is significant and contributes to the high temperature of Earth's core, which is transferred to the surface through convection, conduction, and radiation. This heat is a crucial factor in maintaining Earth's internal temperature.
Learn more about Earth's core heat sources here:
https://brainly.com/question/40730885
