Which of Earth's layers is composed of a liquid phase of iron and nickel?Group of answer choicesMantleCrustInner coreOuter core

Breakdown of the Problem

1. Identify the layers of Earth: Mantle, Crust, Inner Core, Outer Core.
2. Determine which layer is composed of a liquid phase of iron and nickel.

Relevant Concepts

• Earth's interior is divided into several layers: the Crust (solid), Mantle (mostly solid but behaves like a viscous fluid), Outer Core (liquid), and Inner Core (solid).
• The Outer Core is primarily composed of liquid iron and nickel.

Analysis and Detail

• The Crust is the outermost layer and is solid.
• The Mantle is below the crust and mostly solid, with some plasticity allowing for convection currents.
• The Inner Core is solid due to immense pressure despite high temperatures.
• The Outer Core, in contrast, is composed of liquid iron and nickel and is responsible for Earth's magnetic field.

Verify and Summarize

The Outer Core is indeed the layer that is in a liquid state and made primarily of iron and nickel. Understanding the structure of Earth is key to answering this question accurately.

Final Answer

The layer of Earth composed of a liquid phase of iron and nickel is the Outer Core.