Which best describes how we know about the main layers of earth

Both are hard and rigid layers of earth close to the surface. It is thicker than the mantle and the core. It is located between the outer and the inner core. ... Q. The diagram below shows four layers of Earth's internal structure.Which layer is composed mostly of solid iron and nickel?

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called