Final answer:
The ionosphere is not included in the Earth's interior concentric zones; it is actually a layer of the Earth's atmosphere, while the crust, mantle, and core constitute these zones.
Step-by-step explanation:
The Earth's interior structure is layered, based on both chemical and physical properties. The main layers include the crust, the mantle, and the core, which is split into the inner and outer core. The crust is the outermost layer, with continental and oceanic types that vary in composition and thickness. The mantle lies between the crust and the core. It's a massive layer composed of silicates that have a plastic flow behavior under high temperatures and pressures. Deep within the Earth, we find the core, including the inner core (solid) and outer core (liquid), primarily made of iron and nickel alloys.
The ionosphere, on the other hand, is not a part of the Earth's interior; instead, it is a layer of Earth's atmosphere that is ionized by solar and cosmic radiation and is known for its importance in radio communications.