Question

If a student is asking questions about the inner core of Earth, which of the questions below will be correctly answered “yes”?
OPTIONS

Is the layer exposed to erosion?


Does the layer flow like a solid?


Is the layer made of solid metal?


Is the layer the thinnest layer?

Answer 1

To determine which questions about the Earth's inner core can be correctly answered with "yes," let's analyze each option:

1. **Is the layer exposed to erosion?**
- **Answer:** No. The inner core is not exposed to erosion because it is located deep within the Earth, thousands of kilometers below the surface.

2. **Does the layer flow like a solid?**
- **Answer:** Yes. The inner core is generally considered to behave like a solid due to the immense pressure at that depth, even though it is composed of liquid metal in the outer core.

3. **Is the layer made of solid metal?**
- **Answer:** Yes. The inner core is primarily composed of solid iron and nickel.

4. **Is the layer the thinnest layer?**
- **Answer:** No. The inner core is not the thinnest layer of the Earth; it is actually one of the thicker layers, with a radius of about 1,200 kilometers.

Therefore, the correct questions that can be answered with "yes" are:
- **Does the layer flow like a solid?**
- **Is the layer made of solid metal?**