Earth Differentiation: First Consequence

Earth's differentiation was an early process where materials separated based on density. This occurred when the planet was largely molten, allowing heavier elements to sink towards the center and lighter elements to rise.

Core Formation Explained

The first consequence of this density-driven separation, also known as differentiation, was the formation of the Earth's core. The densest materials, primarily iron and nickel, sank to the center under gravity, forming the core.

Other Options Analysis

• Continental crust: This formed much later from lighter, less dense materials that rose to the surface after the initial differentiation.
• Oxygen-rich atmosphere: This developed significantly later, primarily through biological processes (photosynthesis), long after the Earth's initial formation and differentiation.
• Oceans: These formed even later, likely from volcanic outgassing and possibly cometary impacts, requiring the Earth to cool sufficiently for water vapor to condense.

Therefore, the formation of the core was the direct and initial result of Earth's earliest differentiation.