Materials

AS Unit G491 - Physics in Action

Chapter 4 - Materials

Title	Description
Can I cope with the maths?	Try these questions to give you practice with the slightly higher level of mathematics skill required to succeed at AS Level.
Chapter 4 & 5 Overview	This document gives you an overview of the content of chapters 4 and 5.
Chapter 4 & 5 checklist	You should be familiar with all the content on this checklist by the end of the module.
Classes of materials	There are many different types of materials. This powerpoint presentation details some of the properties and classes you need to know about.
Tensile testing of metal wire	Use this worksheet to record the data for the practical task testing the behaviour of metal wire under tensile stress.
Instructions for the Young's modulus practical task	Follow these instructions to test the young's modulus of your chosen material.
Producing a stress-strain graph for copper	Follow these instructions to help you produce a stress-strain graph of your data in excel.
Stress and strain calculations	Here are some straightforward problems to get you started with stress, strain and Young's Modulus calculations.
Calculations on Young's Modulus	Try these questions - Calculations on Young's Modulus (Q45S).
Stress and strain graphs	These graphs show you how different materials behave under stress and strain.
Definitions of mechanical properties	Definitions - handy for those past paper questions where you have to explain the key terms
Structures of materials	This task requires you to link the properties of a material to its structure.
Structures of materials - explanation task	This task requires you to explain how the properties of a material are determined by its structure, using suitable technical language.
Crystalline, polycrystalline and amorphous	Diagrams to describe these three types of arrangement
Measuring resistivity	Practical task to find resistivity of nichrome wire from the gradient of a graph
Measuring variation of resistance with temperature	Practical task to measure the variation of resistance of laquered copper wire with temperature
The effect of temperature on conductivity	Temperature affects the conductivity of both classical conductors and semiconductors. This document explains how and why.
Resistivity and Conductivity	Try these questions on resistivity and conductivity (Q80S).
Materials Presentation Coursework - Brief	This brief details what is required from you for the materials presentation coursework task.
Materials Presentation - Essential Skills communications criteria	You need to meet numerous criteria for the communication element of your Essential Skills qualification. This can be achieved through the AS materials presentation task. This powerpoint presentation details the requirements.
Materials Presentation - Plan guidance	You need to prepare and hand in a plan for the materials presentation. This document details what you should include in your plan.
Materials selection charts	Use the materials selection charts to help you find a range of materials with the properties specified on this sheet.
Uncertainties	Systematic and random uncertainties. Two practical tasks to explore the difference.

Old content - not in current spec
Refraction and reflection problems	Try these questions on refraction and reflection(Q60S).