Lava is primarily made up of molten rock, which consists mainly of silicate minerals and various gases. The key components of lava include:
- Silica (SiO2) - the most abundant component in most lavas, determining the viscosity and type of lava.
- Aluminum (Al2O3)
- Iron (FeO and Fe2O3)
- Calcium (CaO)
- Magnesium (MgO)
- Sodium (Na2O)
- Potassium (K2O)
Based on the options you've provided, "Iron and Nickel" is the closest choice, as iron is indeed a significant component of lava, while nickel is not typically a major constituent. However, it's important to note that nickel is present in small amounts in some types of lava, but the primary constituents are those listed above.
Thus, none of the options perfectly describe lava's composition, but "Iron and Nickel" is the best among the choices given, acknowledging that it's not comprehensive or entirely accurate.
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