What are the hardest to softest layers of earth?

Answer 1

the hardest layer of the earth's surface is the crust because it is made up of rocks and other hard materials

Answer 2

The hardest layer of the Earth is the inner core, consisting mainly of solid iron and nickel. Followed by the outer core which is liquid iron and nickel. The mantle is softer than the core but still solid, made up of hot, flowing rock. The crust is the Earth's outermost layer and the softest of the four layers.