Which of the following is not true concerning the layers of the earth? a. the core is mostly composed of metals. b. the mantle has both solid and liquid regions. c. the layers of earth are uniform in thickness. d. the lithosphere includes both the crust and upper, solid mantle. select the best answer from the choices provided a b c d

Earth's layers have different thicknesses and do not have a uniform average composition, being the crust (the outermost zone of the concentric structure of the geosphere and the layer in which we live) considered thinner with a variable thickness; from 5 km on the ocean floor, up to 70 km in the mountainous areas of the continents.

Therefore the statement "The layers of Earth are uniform in thickness" is false.