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:

1. Analyze each option:

• "The asthenosphere keeps Earth’s crust from getting too hot." → Incorrect. The asthenosphere's role isn't heat regulation for the crust.
• "Earth’s plates float on the denser asthenosphere." → Correct. Tectonic plates (part of the crust/lithosphere) float on the semi - fluid asthenosphere.
• "The depth of the asthenosphere keeps pressure on Earth’s core." → Incorrect. The asthenosphere is above the mantle - core boundary, not a pressure - maintaining layer for the core.
• "The asthenosphere allows Earth’s crust to move." → Correct. Its semi - fluid nature enables the movement of tectonic plates (crustal plates).
• "The asthenosphere creates Earth’s magnetic field." → Incorrect. The magnetic field is created by the outer core's molten iron movement.

Answer:

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