The solid portion of the Earth includes the crust, the mantle, and the inner core. Which of following elements is abundant in the solid portion of the Earth?
argon oxygen silicon iron carbon

Witch type of microscope is used to view very small cell components like proteins and dna?

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Along what geographical feature are most of the oil producing regions located