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Oxygen and silicon are the two elements that make up 75 percent of the total mass of the crustal rocks on Earth.
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Hydrogen and helium are the two main gases that make up the Sun. Hydrogen is the primary component, making up about 75% of its mass, while helium accounts for most of the remaining mass.
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Oxygen and silicon are the two most abundant elements in the Earth's crust. They make up about 75% of the Earth's crust by weight.