Y8 mid year exam

• Sustainability is, capable of being continued with minimal long term effects on the environment
• finite resources are non renewable materials that are limited supply and cannot be regrown or replaced
• non finite resources are renewable materials that can be regrown or replaced
• petrochemicals are chemicals that are obtained from petroleum and natural gas
• carbon footprint is the total amount of greenhouse gases (including co2) that are generated by our actions
• biodegradable is the ability for a material to be broken down naturally by organisms in the ecosystem
• design for disassembly is a building process that allows for the easy recovery of products, parts and materials when a building is disassembled or renovated
• natural fibres are fibres that are obtained from plants, animals or mineral sources
• synthetic fibres are fibres made from raw materials such as petroleum, based on chemicals or petrochemicals
• regenerated fibres are artificial fibres transformed from plant cellulose into yarn
• a fibre is a thread or filament from which a vegetable tissue, mineral substance, or textile is formed
• yarn is long interlocked fibres, used in sewing, crocheting, knitting, weaving, embroidery, rope making, and the production of textiles
• a loom is a device used the weave cloth and tapestry
• a warp is the threads on a loom over and under which other threads (the weft) are passed to make cloth
• weft is a yarn that passes horizontally across the fabric roll
• selvedge is the finished end of the fabric
• pattern piece is the pieces/template that you lay on your fabric to cut around and sew together to create a garment
• grain line is the direction of the straight grain - this should run parallel to the Selvedge
• notches is to match up pattern pieces and mark the position of features 
• seam allowance is the distance between the cutting and sewing line
• bias cutting is to be cut on the grain
• lay plan is a scale/visual representation of how your pattern pieces should be positioned on the fabric