The author has over 20 years’ experience of teaching and has worked in wide range of schools with very diverse student groups. He holds an MSc in “Education and Technology in Science”. This lessons and scheme of work have been successfully trialed and refined in the classroom environment.
The author has over 20 years’ experience of teaching and has worked in wide range of schools with very diverse student groups. He holds an MSc in “Education and Technology in Science”. This lessons and scheme of work have been successfully trialed and refined in the classroom environment.
This lesson contains three parts and probably will take a double lesson.
The first, introductory presentation looks at where three different, common metals come from and introduces the ores of Zinc, Magnesium and Iron with a visual comparison with the pure, elemental metal. There is a slide showing a vast open-cast Haematite mine to show the scale of ore extraction to supply our demand for metals.
The second presentation is for the basic metal and dilute Hydrochloric acid practical.
It shows the basic method, safety and comes complete with a blank results table to project onto the whiteboard.
It also contains a Teacher Demonstration of how to collect the resultant Hydrogen gas - in order to demonstrate the characteristic 'squeaky pop' of ignited hydrogen.
Finally, there is a worksheet for more academic groups to learn how to name the salts produced from the reactions of the different metals with hydrochloric acid reactions.
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Many thanks
This 9 slide presentation introduces the idea of metals burning using stunning images and a You Tube video of burning Iron wool with a long exposure (complete with safety information). It continues by discussing the three factors that determine the combustibility of a metal in air.
The second part of the lesson is the classic burning magnesium in a crucible complete with diagram, results table, safety instructions and a step-by-step visual guide provided by a You Tube video.
The quantitative practical shows not only how reactive metals can burn in air but also re-visits the Year 7 Conservation of Mass concept by weighing the magnesium before and the magnesium after.
The presentation concludes with a page reference to reinforce the learning and there is also a word-search included as a starter.
If you like this lesson, please don't forget to review it and feel free to browse my shop where there are many more.
