canopy
320,000 ft above sea leavel
The C and R horizon
The core!
Pumice is a porous rock and slat is not. Pumice floats in water because of the air pockets in the rock. Slate is a layer of rock that is tightly packed, or is very "dense".
The Exosphere.
The core is the most dense layer
The mantle is denser than the Earth's crust but less dense than the Earth's core. It is the second densest layer of the Earth.
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.
Thermospehere
No, the exosphere is the least dense layer of Earth's atmosphere. It is the outermost layer where atmospheric molecules are extremely sparse and has a gradual transition into outer space.
Hmm... let me see. Hey, Mom, what's the answer? Oh, that's right. The Exosphere is the answer to this question.