Earth Layers Worksheet - Free Printable

Problem Description:

The task involves identifying the correct names of the Earth's layers based on their descriptions. The Earth has four main layers: Inner Core, Outer Core, Mantle, and Crust. Each description corresponds to one of these layers, and the goal is to match the descriptions with the correct layer names.

Step-by-Step Solution:

#### Description 1:
- "This layer makes up two-thirds of the Earth’s mass and is about 1,800 miles deep. It is made up of a thick, solid, rocky substance, with portions that melt enough to flow."

- Analysis:
- This layer is described as being very dense and making up a significant portion of the Earth's mass.
- It is mentioned as having a solid, rocky composition but with some parts that can flow (melt).
- The depth is given as about 1,800 miles, which aligns with the characteristics of the Mantle.
- The Mantle is known for its solid rock structure but can flow over long periods due to high temperatures and pressures, a process called plastic deformation.

- Conclusion: This description matches the Mantle.

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#### Description 2:
- "Surprisingly, this layer is thought to be solid, even though it is furthest from the surface and beneath what’s thought to be molten lava. Lava is thought to be made mostly of iron and nickel."

- Analysis:
- This layer is described as being solid despite being far from the surface and located beneath molten material.
- It is mentioned that the material is primarily composed of iron and nickel.
- These characteristics align with the Inner Core, which is believed to be solid due to immense pressure, despite being surrounded by the liquid Outer Core.

- Conclusion: This description matches the Inner Core.

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#### Description 3:
- "This layer of the Earth is hard and composed of different minerals. It is the thinnest layer."

- Analysis:
- This layer is described as being hard and composed of various minerals.
- It is explicitly stated to be the thinnest layer.
- These characteristics align with the Crust, which is the outermost layer of the Earth and varies in thickness (typically 5–70 km) but is much thinner compared to other layers.

- Conclusion: This description matches the Crust.

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#### Description 4:
- "At a depth of 3,000 miles beneath the surface, this layer is believed to be made mostly of iron and nickel."

- Analysis:
- This layer is described as being located at a depth of 3,000 miles beneath the surface.
- It is mentioned to be composed mainly of iron and nickel.
- These characteristics align with the Outer Core, which is known to be liquid and composed primarily of iron and nickel.

- Conclusion: This description matches the Outer Core.

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Final Answer:

1. Mantle
2. Inner Core
3. Crust
4. Outer Core

$$
\boxed{\text{Mantle, Inner Core, Crust, Outer Core}}
$$