Density of Earth

The density of Earth measures how much mass there is in a given volume, indicating whether materials are light or heavy. Earth's average density is about 5.5 grams per cubic centimeter, which is denser than most rocks and minerals. This high density results from its layered structure: a dense iron-nickel core, surrounded by less dense rocky mantle and crust. The density helps scientists understand Earth's composition, internal processes, and how it compares to other planets. In simple terms, Earth's density reflects that it is made of tightly packed materials, making it a relatively heavy planet for its size.