This solid layer of the earth is made of mostly iron and nickel. ANSWER ASAP TEST IS NOW A. Outer core

B. Crust

C. Inner core

D. Mantle

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

Light waves can move through , but they travel fastest when they move through a(n) .