The Earth doesn't have a single specific gravity because it's composed of different materials with varying densities. However, we can talk about the average specific gravity of Earth.

The average specific gravity of Earth is about 5.52.

Here's why:

* Specific gravity is the ratio of the density of a substance to the density of a reference substance, usually water.

* Earth is composed of a dense iron core, a less dense mantle, and a relatively thin crust.

* The varying densities of these layers contribute to the overall average specific gravity.

Important Note:

* The specific gravity of different parts of Earth varies significantly. The core has a much higher specific gravity than the crust.

* The figure of 5.52 is an average, and it doesn't account for regional differences.