Students will investigate the production and recycling of aluminium using deodorant cans as a context. They will investigate the costs of manufacturing aluminium from raw materials and compare these to recycling figures. Students will identify relationships showing direct proportion and use relevant formulas to calculate values related to aluminium production and carbon emissions.
- understand the impact of recycling aluminium
- recognise directly proportional quantities
- be able to apply direct proportion formulas to solve problems related to the production of aluminium from raw and recycled materials
- recall proper recycling methods for metals
- recognise proportional relationships
- solve for the proportionality constant, k, using formulas and aluminium production values
- calculate the bauxite requirements and carbon emissions using direct proportion formulas
Lesson guides and printables
Australian curriculum content descriptions:
Year 9 Maths:
- Solve problems involving direct proportion. Explore the relationship between graphs and equations corresponding to simple rate problems (ACMNA208).
General capabilities: Numeracy, Critical and creative thinking, Ethical understanding.
Cross-curriculum priority: Sustainability OI.8.
Relevant parts of Year 9 Mathematics achievement standards: Students interpret ratio and scale factors in similar figures.
Unit of work: Visy Education – Secondary Mathematics.
Time required: 70 mins.
Level of teacher scaffolding: Medium – teachers will need to guide students through various parts of this lesson, particularly the introduction, to ensure students understand the background knowledge.
This lesson is designed to build students’ competencies in the following skills:
- Critical thinking
- Global citizenship
- Problem solving
- Social skills
This lesson has been developed in partnership with Visy. For over 70 years Visy has been committed to finding sustainable solutions for Australia and New Zealand’s recyclables and helping to reduce local landfills. Visy collects, receives and sorts paper, cardboard, glass, plastics, steel and aluminium from households, businesses and schools with the purpose of reusing these products in the re-manufacture of new packaging products.