The Exosphere.
The core is the most dense layer
It is neither. The densest layer is the inner core. The least dense layer is the crust.
Thermospehere
The highest.
i think the crust
The least dense layer will be found on top of the other layers, as less dense materials tend to float on top of denser materials.
Earth's outermost layer, the crust, is the least dense layer. It is composed of lighter rocks such as granite and basalt. The crust floats on the denser layers beneath it, including the mantle and the core.
The Earth's Crust.
Basically, the higher you get in the atmosphere, the less dense it gets. It's the exosphere.
Thermospehere
No. The troposphere is the lowest, and densest, layer of the atmosphere. The exosphere is the outermost, thinnest layer.
Hmm... let me see. Hey, Mom, what's the answer? Oh, that's right. The Exosphere is the answer to this question.