Question

1. Which of the layers below are defined as a layer by its physical properties? a. Crust b. Mantle c. Outer Core d. Core

2. Earth’s magnetic field is generated by the convection of the: a. Lithosphere b. Asthenosphere c. Mesosphere d. Outer Core e. Inner Core

3. When hiking down most shield volcanoes, which rock composition(s) will you see from its base to its summit? a. Felsic at the bottom, intermediate in the middle, and mafic at the top b. Mafic at the bottom, intermediate in the middle, and felsic at the top c. Intermediate from bottom to top d. Mafic from bottom to top

Answer 1

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Answer 2

Q.1. Crust / Lithosphere, Q.2. Outer Core, Q.3. Mafic from bottom to top

Step-by-step explanation:

This rigid layer includes the brittle upper portion of the mantle and the crust.

The magnetic field is generated by electric currents due to the motion of convection currents of molten iron in the Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.

Most shield volcanoes are mafic in composition.