Question

why would a prospector look for deposits of magnetite rather than deposits of iron?
iron deposits are difficult to detect on their own.
magnetite can be used to attract iron deposits.
magnetite is an ore that contains the element iron.
iron is always found next to magnetite deposits.

Explanation:

Magnetite (\(Fe_3O_4\)) is an iron ore. Iron in nature is usually found in the form of compounds (ores) rather than as pure iron. Magnetite contains iron, so prospectors look for magnetite deposits to find iron - related resources.
The first option is incorrect because the problem is not about the detectability of pure iron deposits. The second option is wrong as magnetite is not used to attract iron deposits in this context. The fourth option is an over - generalization as iron is not always found next to magnetite deposits.

Answer:

Magnetite is an ore that contains the element iron.