Describe each layer of the earth in terms of Composition, state of matter.

core mantle and crust are divisions based on composition of the crust makes up less than 1% of Earth's biomass consistency of oceanic crust and continental crust is often More For Less sick Rock the mantle is hot and represents about 68% of its mass finally the core is mostly iron metal

Top: Crust, Between both: Mantle, Middle of earth: Core.

Explanation:

I don't know how to describe the layers in terms of composition but i hope my answer helped

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.