TECHNOLOGY EXTERNAL

91049

What we will cover

❏ Terminology

❏ The Standard

❏ What evidence needs to be demonstrated

❏ How to approach 91049 so that evidence is generated

❏ Authenticity

TERMINOLOGY FOR 91049 (1.6)

TERM DEFINITION

Describe List/name/label and giving detail

Explain Enough clarity and/or detail to be understood by somebody

Justify To reason – the why

Discuss To examine critically, to exchange ideas

The Standard - 91049

For Achieved

Demonstrate understanding of how materials enable technological products to function involves:❏ describing the composition, structure and performance properties of

materials used in a technological product

❏ describing the impact of the composition and structure of materials on how materials can be manipulated (e.g. mixed, shaped, joined, combined, separated, finished)

❏ explaining how the materials used and the way they have been manipulated allow technological products to function as intended.

For Achieved with Merit

Demonstrate in-depth understanding of how materials enable technological products to function involves:❏ explaining how the composition and structure of materials determine

the performance properties the materials exhibit

❏ explaining how the composition and structure of materials determine the ways materials can be manipulated.

For Achieved with Excellence

Demonstrate comprehensive understanding of how materials enable technological products to function involves:

❏ discussing how the interaction between the composition, structure and manipulation of materials enables technological products to function as intended.

Evidence Students Need To Demonstrate

CompositionAll wood consists of cellulose, hemicellulose, and lignin.

Evidence could be in form of a diagram, chemical structure or written explanation

Structure

There are several layers of bran. They protect the seed, and by being partly waterproof, ensure that the seed will not start to grow again immediately after harvest. At one end of the grain is the germ; that is the young plant that will grow when the grain is put into the soil and given the right conditions of moisture and warmth. The aim of the miller in making white flour is to obtain the greatest possible amount of the whitish interior of the grain, the endosperm (the grains food supply), with the least possible contamination by bran and germ. Bran is not wanted mainly because of its' colour and texture. Germ is not wanted because of its high fat content which reduces the keeping quality.

Performance Properties

I have decided to build a street luge. The material I have chosen to make my luge out of needs to be paintable, joinable, durable, malleable, able to be shaped and manipulated, strong robust and light. The material I will make my luge out of is mild steel. Mild steel has an alloy (iron and carbon) composition. It has high tensile strength, is ductile, tough and fairly malleable.

Describing the impact of the composition and structure of materials on how materials can be manipulated.

This alteration of the grain is called cross-graining and has several important benefits; it reduces the tendency of wood to split when nailed at the edges. It reduces expansion and shrinkage, providing improved dimensional stability.

Egg yolk contains proteins that work as emulsifying agents as there are two types of amino acids in the yolk; one type that repels water and one type that attracts water. This means that when mixing with substances such as oil and water (when making hollandaise sauce) some of the protein in the egg yolk will stick to water and the other part will stick to the oil.

Explaining how the materials used and the way they have been manipulated allow technological products to function as intended.

Poly Cotton fabric was the fabric we used to make our hoodies. It is 65% polyester and a 35% cotton blend. By using a blend of cotton and polyester it combines their strengths to make a fabric that is tear resistant, breathable and easy to fashion into abrasion resistant fabrics. Another bonus to using this fabric is it costs less than garments made out of 100% cotton and it provides much more comfort. The yarn was woven to make the poplin and knitted into double brushed jersey knit the two fabrics we used to create our hoodies

TERMINOLOGY FOR 91049 (1.6)

TERM DEFINITION

Describe List/name/label and giving detail

Explain Enough clarity and/or detail to be understood by somebody

Justify To reason – the why

Discuss To examine critically, to exchange ideas

Evidence of Use/Demonstrating Understanding

Students can show evidence of use or their understanding of the information through a number of ways.

Through a written brief

Introduction to their report

Evidence of students experimenting with materials e.g. trialling, testing, manipulating etc.

Comparisons between different materials or processes

Evidence of a final outcome or an Evaluation

Brief

Brief

Introduction

Experimentation

Comparison between processes

Comparison between materials

Interaction with Report Once students have started their report, at the end of each session/period I get

them to email me what they have completed.

I read through their report and ask questions to clarify their understanding and thought process.

This helps both students and myself in ensuring students are:

• On the right track with the report

• Interacting early on in their report so they feel they are making progress

• Helping their understanding and therefore their evidence towards using the evidence and demonstrating understanding

• Keeping tabs/checks on Authenticity throughout the report writing stage

Interaction with Report ActivityCan you make a distinction between … and … ?

How would you compare … and … ?

What contrasts exist between … and … ?

Can you point to similarities between … and … ?

What is the function of … ?

What is the relationship between … ?

What is the main idea of … ?

Can you explain what is happening … what is meant … ?

Wool can be transformed into textiles, how is this achieved?

What can you say about … ?

Why and how the manipulation of beating of egg whites enables you to make a pavalova?

Why is it that some materials cannot be bent/shaped without first changing their physical characteristics? – examples include: steaming wood; annealing ferrous and non ferrous metals; hardening a high-carbon steel.

Problems/Mistakes with Reports

Not relating their report to their own Technological experience

Didn’t present evidence of using the information or demonstrating understanding.

Candidates focused on the making or growing process of the material e.g. cotton, plywood in a way that was not related to the standard.

Candidates focused upon what the product could do without reference to how the materials enabled the product to function.

Candidates/teachers insisted on producing the maximum number of pages.

Focused on products and function

Didn’t identify either composition or structure

91049 - Demonstrate understanding of how materials enable technological products to function

Candidates can use evidence from one or more technological products when considering how materials enable them to function

❏ It is essential that students produce their report in relation to a the technological experience/s they have had during the year/course

❏ The material included should clearly communicate the candidate’s understanding

❏ Reports produced without close reference to the individual candidate’s experience of material(s) in relation to an actual product are unlikely to succeed.

Authenticity

The use of information from other sources can assist the candidate to demonstrate understanding only where the candidate uses the information by one or more of the following:

interpreting or rewriting the information in their own words

relating the information to a specific context or example

commenting meaningfully on the information.

Schools are required to have in place a process to verify for each candidate that the material presented for external assessment is each candidate’s own.