Traditional Materials Science
Traditional Materials Science · Years 7–10
Ngā Whāinga Akoranga · Learning Intentions
- Investigate a significant question using evidence from multiple sources
- Analyse and evaluate information to form and support a reasoned position
- Connect learning to real-world contexts, including Aotearoa New Zealand settings
- Communicate understanding clearly and accurately for a specific audience
Paearu Angitu · Success Criteria
- I use at least two sources and can evaluate their credibility
- My position is clearly stated and supported by specific evidence
- I can connect my learning to at least one real-world Aotearoa context
- My communication is clear, organised, and appropriate for the audience
Advanced Lithic & Fibre Technology
Early Māori weren't just "gathering" materials; they were engineering them. Whether selecting stone that wouldn't shatter in battle or weaving fibres to hold tons of tension in a sailing waka, they applied deep understanding of material properties.
Harakeke: The Master Bio-Composite
Phormium tenaxHarakeke (Flax) is a natural composite material. It has strong cellulose fibres embedded in a softer lignin matrix—just like carbon fibre!
Mātauranga Engineering
- Processing (Muka): Scraping the green "skin" off reveals the inner fibres (muka). This removes the weak material and leaves the high-tensile core.
- Weaving Patterns (Raranga): Weaving at 45° angles (diagonal) distributes stress better than 90° grids. This creates baskets (Kete) that can expand without breaking.
- Plaited Ropes: Braiding 4, 8, or 12 strands distributes the load so if one strand snaps, the rope holds.
The Material Physics
- Tensile Strength: Muka fibre is incredibly strong under tension. Some tests show it rivals steel wire by weight!
- Anisotropy: The leaf is strong length-wise (longitudinal) but weak width-wise (transverse). You can strip it easily by hand, but you can't snap it.
Pounamu: The Unbreakable Stone
Nephrite JadeCrystal Structure (Science)
Most stones (like Quartz or Obsidian) have crystalline structures that line up perfectly. When hit, a crack runs straight down the line (cleavage).
Pounamu / Nephrite is different. Its crystals are made of microscopic interlocking fibres (a felted structure). It's like a microscopic wool mat made of rock!
Tool Making (Technology)
Because it doesn't chip (flake) like obsidian, you can't knap it. You must preserve its toughness by grinding it with sandstone and water.
- Toki (Adzes): Used for carving wood canoes. Pounamu holds a sharp edge even when hitting hard timber.
- Mere (Clubs): A thin Pounamu club is stronger than a thick bone one.
Waka: Engineering Flexible Strength
Lashing vs. Nailing
Western boats used iron nails (rigid). Polynesian Waka used fibre lashing (flexible).
- The Problem: In big ocean swells, a hull twists. A rigid structure (nails) concentrates stress at the join, causing wood to split or nails to pop.
- The Solution: Lashing allows the waka components to move slightly ("give") with the waves, distributing the stress across the whole rope system. It's a kinetic structure.
⚗️ Lab Challenge: The Strength of Structure
Testing Weave Strength
Goal: Determine whether a woven structure is stronger than separate strands.
Materials
- Paper strips or Flax strips
- Weights (coins/washers)
- Tape
Method
- Control: Tape 4 strips of paper side-by-side (parallel). Hang weights until they tear.
- Test: Weave 4 horizontal and 4 vertical strips into a square mat. Hang weights.
- Analyse: Why does the weave hold more? (Hint: Explain using "Force Distribution" and "Friction").
Hononga Marautanga · Curriculum Alignment
Level 3–4: Investigate social, cultural, environmental, and economic questions; gather and evaluate evidence from diverse sources; communicate findings and reasoning clearly for different audiences and purposes.
Level 3–4: Read, interpret, and evaluate information texts; write clearly and purposefully for specific audiences; apply critical thinking skills to evaluate sources and construct well-reasoned responses.
Tuhia ōu whakaaro · Write Your Thoughts
Reflect on your learning. What was the most important idea? What question do you still have?
Aronga Mātauranga Māori
This resource sits within a kaupapa that recognises mātauranga Māori as a living knowledge system with its own frameworks, values, and ways of understanding the world. The New Zealand Curriculum calls for learning that reflects the bicultural partnership of Te Tiriti o Waitangi, which means every subject area has an obligation to engage authentically with Māori perspectives — not as cultural decoration but as substantive contributions to how we understand our topics. The concepts of manaakitanga (care for others), kaitiakitanga (guardianship), whanaungatanga (relationship and belonging), and tino rangatiratanga (self-determination) provide a values framework applicable across all learning areas, and all are relevant to the work in this handout.
Ngā Rauemi Tautoko · Resources already provided
This handout is designed to be used alongside other resources in the same unit. Related materials are linked in the unit planner. All content is provided — no additional preparation is required to use this handout in your classroom.
Curriculum alignment
- Nature of Science — Knowledge: Science is a way of investigating, understanding, and explaining our natural, physical world; mātauranga Māori offers complementary systems of knowledge that enrich scientific understanding.
- Identity, Culture, and Organisation: Understand how different knowledge systems — including mātauranga Māori — shape how communities relate to the natural world.