Recall that steels are alloys of iron containing carbon and sometimes other metals. (Chemistry only)

In the subtopic Alloys as useful materials, this learning objective focuses on recall that steels are alloys of iron containing carbon and sometimes other metals. (Chemistry only). Within Using materials, students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include alloy, steel, and chemistry only. steel means an alloy of iron that contains carbon and may include other metals, used for its strength and durability. Avoid students often think that all steels contain the same amount of carbon and that they are only made from iron; instead remember that steels are alloys of iron that can contain varying amounts of carbon and sometimes other metals, leading to different properties. For exam answers, remember that steel is an alloy primarily made of iron and carbon, and may include other metals.