History explains the present events and happenings, hence, identifying issues that are relevant in the present is one of the objectives which must be focused on while teaching history.Geography provides relevant details regarding the space/place where living things (including humans) live. It provides information regarding the natural and physical resources needed for proper sustenance. By teaching, 'Iron Smelters and factory owners', the following topics are interlinked:Mineral Resource: As we all know, iron is a mineral which is obtained from HematiteIndustries: The teacher can talk about iron industries present in the local area, and at the state and the national level. Inside Our Earth: Earths inner core is the innermost geologic layer of the Earth and it is made of iron.Hence, as a teacher, you can make interlinkages while discussing 'Iron smelters and factory owners', a theme in History, with all the above-mentioned topics.