Question

which of the following is not true of earths mantle?
it is static, meaning that it does not flow or move.
it is made up of rocks that are mostly made of magnesium, silicon, and oxygen.
it is the largest of all layers, making up over 80% of earths volume.
the crust floats on the mantle like a boat floats on water.

Explanation:

The Earth's mantle is not static. It is semi - molten and undergoes convection currents due to heat transfer from the core. The rocks in the mantle are mainly composed of magnesium, silicon, and oxygen. It is the largest layer, making up over 80% of Earth's volume, and the crust floats on it.

Answer:

It is static, meaning that it does not flow or move.