What are the elements of earth?

What elements is earth made of?

• Answer:

  Atoms. duh. I do not agree with that. We will go into what are Earth is made of starting at the core of the planet. The core is mostly made up of iron and nickle although some lighter elements may be present too. Temperatures at the core at thought to be as high as 7500K (which is hotter then the surface of the sun). Beside the core is the lower mantle which consists of silicon, magnesium and oxygen, with some iron, calcium and aluminum. The upper mantel is mostly olivine, and pyroxene (iron /magnesium silicates/, calcium and aluminum. We know most of what lies inside the earth by seismic techniques. Now, taken as a whole, the Earth's chemical composition (by mass) is: 34.6% Iron; 295.%Oxygen; 15.2% Silicon; 12.7% Magnesium; 2.4% Nickel; 1.9% Sulphur; 0.05% Titanium.