Next O Matter Around Us: Mastery Test
3
Select the correct answer from each drop-down menu.
William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substances involved in the rusting
process of iron?
Iron is
atoms,
a compound
an element
a mixture
with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of
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