Question

Where does the heat come from?​

Answer 1

Answer:

There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements

Answer 2

ᴛʜᴇʀᴇ ᴀʀᴇ ᴛʜʀᴇᴇ ᴍᴀɪɴ ꜱᴏᴜʀᴄᴇꜱ ᴏꜰ ʜᴇᴀᴛ ɪɴ ᴛʜᴇ ᴅᴇᴇᴩ ᴇᴀʀᴛʜ

1. ʜᴇᴀᴛ ꜰʀᴏᴍ ᴡʜᴇɴ ᴛʜᴇ ᴩʟᴀɴᴇᴛ ꜰᴏʀᴍᴇᴅ ᴀɴᴅ ᴀᴄᴄʀᴇᴛᴇᴅ, ᴡʜɪᴄʜ ʜᴀꜱ ɴᴏᴛ yᴇᴛ ʙᴇᴇɴ ʟᴏꜱᴇ
2. ꜰʀɪᴄᴛɪᴏɴᴀʟ ʜᴇᴀᴛɪɴɢ, ᴄᴀᴜꜱᴇᴅ ʙy ᴅᴇɴꜱᴇʀ ᴄᴏʀᴇ ᴍᴀᴛᴇʀɪᴀʟ ꜱɪɴᴋɪɴɢ ᴛᴏ ᴛʜᴇ ᴄᴇɴᴛᴇʀ ᴏꜰ ᴛʜᴇ ᴩʟᴀɴᴇᴛ; ᴀɴᴅ
3. ʜᴇᴀᴛ ꜰʀᴏᴍ ᴛʜᴇ ᴅᴇᴄᴀy ᴏꜰ ʀᴀᴅɪᴏᴀᴄᴛɪᴠᴇ ᴇʟᴇᴍᴇɴᴛꜱ.