2. The assumption also considers the variability in the weight of elements in the Earth's crust. Different elements like silicon, aluminum, iron, calcium, magnesium, sodium, potassium, and titanium have varying abundances in the Earth's crust, which influences the total weight of oxides when combined.
3. Finally, the assumption takes into account the difference in the weight of oxides for each element in the crust. Each element will have a unique ratio of oxide weight to elemental weight, leading to the overall total percentage of oxides exceeding 100% in the calculation.
Write the above information separately briefly in two short sentences each
1. Different elements in the Earth's crust have varying abundances, affecting the total weight of oxides when combined.
2. Each element in the crust has a unique ratio of oxide weight to elemental weight, resulting in the total percentage of oxides exceeding 100% in calculations.