When you look at this division over here, the crust is solid, the mantle actually has some parts of it that are solid, so the uppermost part of the mantle is solid, then below that, the rest of the mantle is in this magma, this deformable, somewhat fluid state, and depending on what depth you go into the mantle there are different levels of fluidity, and then the core, the outer layer of the core is liquid because the temperature is so high, the inner core is made up of the same things and the temperature is even higher but also the pressure is so high, so it's actually solid.