The Exosphere.
It is neither. The densest layer is the inner core. The least dense layer is the crust.
The core is the most dense layer
No. It is the most dense.
The atmosphere.
Thermospehere
The highest.
i think the crust
No. The atmosphere is the least dense layer. The densest layer is the inner core.
The Earth's Crust.
Basically, the higher you get in the atmosphere, the less dense it gets. It's the exosphere.
Thermospehere
Hmm... let me see. Hey, Mom, what's the answer? Oh, that's right. The Exosphere is the answer to this question.