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PKSC 1020: MIDTERM EXAM 2025 QUESTIONS AND ANSWERS What is the most abundant metallic element in the Earth's crust? ....ANSWER☑️☑️...-aluminum What is the main material in aluminum? - ....ANSWER☑️☑️...-46.68% oxygen What is the process of aluminum? - ....ANSWER☑️☑️...-digest bauxite in hot sodium; form sodium aluminate; filter, seed w/aluminum hydrate; crystallize out Al(OH3); heat; form AlO2 aka alumina; reduction cell What happens after reduction? - ....ANSWER☑️☑️...-The aluminum is flattened into a smaller surface area; heavy rollers are used to thin it out Sheet Ingot - ....ANSWER☑️☑️...-soak at 1000f; breakdown; hot or cold rolling Continuous Cast - ....ANSWER☑️☑️...-cold roll Thickness of Aluminum Foil - ....ANSWER☑️☑️...-0.006 Peel-able Lid Stock Thickness - ....ANSWER☑️☑️...-0.002-0.003 Heavy Duty Reynolds Wrap - ....ANSWER☑️☑️...-0.001 Regular Reynolds Wrap - ....ANSWER☑️☑️...-0.0006 Converter Foil - ....ANSWER☑️☑️...-0.00024 to 0.00035 How can you tell the difference between foil vs. metalized film? ....ANSWER☑️☑️...-shine a flashlight through the package; if you see a light = metalized, if you don't see the light = foil FOR STUDY PURPOSES ONLY ©️ 2025 ALL RIGHTS RESERVED 1