The earth is still the earth regardless of the color of the sky. The statement "If the sky is blue, then the earth is what" does not have a specific answer as the two are not directly related.
There is no direct relationship between the color of the sky and the Earth's composition. The Earth is primarily composed of rock and minerals, with different layers such as the crust, mantle, and core. The blue color of the sky is due to the scattering of sunlight by the Earth's atmosphere.
