Final answer:
The density of hematite is 5.3 g/cm³ while the Earth's core has a density of roughly 13 g/cm³. The presence of iron-nickel alloy and higher concentration of heavier elements in the core contribute to its higher density.
Step-by-step explanation:
The density of hematite (iron) is approximately **5.3 g/cm³**. On the other hand, the Earth's core is believed to have an average density of roughly **13 g/cm³**. The difference in density between hematite and the core can be attributed to the presence of other elements and compounds in the core, mainly the iron-nickel alloy.
The inferred properties of Earth's interior, as shown in the graph, indicate a gradual increase in density from the surface towards the core. This can be explained by the gradual compression and higher concentration of heavier elements, such as iron and nickel, as we move towards the core.
Therefore, the iron-nickel alloy composition and the higher concentration of heavier elements in the core contribute to its higher density compared to hematite or other elements found on the Earth's surface.
Learn more about density of Earth's core