Which layer of earth has partially melted material that moves the tectonic plates? crust, inner core, mantle, outer core

One similarity and one difference between an element and a mixture of elements

What is the effect of returning nuclear reactor cooling water back into bodies of water?

Pls i will do pls imma diewhat forms white light? (4 points)a. combination of all wavelengths of ultraviolet light b. combination of all wavelengths of visible lightc. absorption of electromagnetic waves d. absorption of infrared rays