Earths Structure Worksheet with Answers | Exercises Earth ... - Free Printable

Let's solve this step by step.

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Step 1: Fill in the blanks in the definitions

We’ll go through each definition and fill in the missing words based on scientific knowledge about Earth’s internal structure.

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Crust - the outermost surface of the Earth. The crust is quite thin like the skin of an orange and is thinner under the oceans.

> ✔ Explanation: The crust is the thin, outermost layer of Earth. It's compared to the skin of an orange because it's relatively thin compared to the rest of the planet. Oceanic crust is thinner than continental crust.

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Inner core - the solid iron-nickel center of the Earth that is very hot and under great pressure.

> ✔ Explanation: The inner core is the solid central part made mostly of iron and nickel. Despite extreme heat, it remains solid due to immense pressure.

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Mantle - a rocky layer located under the crust. It is extremely hot – about 1000–3700 degrees C.

> ✔ Explanation: The mantle lies beneath the crust and is composed of dense rock. Temperatures range from about 1000°C near the top to around 3700°C near the core.

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Outer core - made of metal so hot that is liquid. This layer moves slowly and produces a magnetic field.

> ✔ Explanation: The outer core is liquid (mostly iron and nickel) and its movement generates Earth’s magnetic field through the geodynamo effect.

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Step 2: Label the diagram

The diagram shows four concentric circles, representing Earth’s layers from outside to inside:

1. Outermost layer → Crust
2. Second layer → Mantle
3. Third layer → Outer core
4. Innermost layer → Inner core

So, label the diagram from the outside in:

- Top arrow (outermost) → Crust
- Second arrow → Mantle
- Third arrow → Outer core
- Innermost arrow → Inner core

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✔ Final Answer

#### Completed Definitions:

Crust - the outermost surface of the Earth. The crust is quite thin like the skin of an orange and is thinner under the oceans.

Inner core - the solid iron-nickel center of the Earth that is very hot and under great pressure.

Mantle - a rocky layer located under the crust. It is extremely hot – about 1000–3700 degrees C.

Outer core - made of metal so hot that is liquid. This layer moves slowly and produces a magnetic field.

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#### Diagram Labels (from outside to inside):

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

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This completes the worksheet! The student should now have all the blanks filled and the diagram correctly labeled.