Question

why are the properties of the asthenosphere important? check all that apply. the asthenosphere keeps earths crust from getting too hot. earths plates float on the denser asthenosphere. the depth of the asthenosphere keeps pressure on earths core. the asthenosphere allows earths crust to move. the asthenosphere creates earths magnetic field.

Explanation:

The asthenosphere is a semi - molten layer in Earth's mantle. Earth's tectonic plates float on it due to its relatively low viscosity. This allows the crust to move. It is not responsible for keeping the crust from getting too hot, nor does it create Earth's magnetic field (which is due to the outer core's motion). Also, it is not the depth of the asthenosphere that keeps pressure on the core.

Answer:

Earth’s plates float on the denser asthenosphere.
The asthenosphere allows Earth’s crust to move.