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Cambridge IGCSE™ Physics Practical Skills Workbook



Cambridge IGCSE™ Physics Practical Skills Workbook PDF

Author: Heather Kennett

Publisher: Hodder Education

Genres:

Publish Date: April 30, 2021

ISBN-10: 1398310557

Pages: 136

File Type: PDF

Language: English

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Book Preface

How to use this book

This Practical Skills Workbook will help you to keep a record of the practicals you have completed, as
well as your results and conclusions. It provides additional practice for the practical skills required by the Cambridge IGCSETM Physics syllabuses (0625/0972) for examination from 2023.
This resource covers Core and Supplement content. Supplement investigations and questions are indicated by a lined box around the text, as shown below.

1 The average value for the refractive index of the glass block is

Some practicals also have Going Further sections, which provide additional questions that apply the scientific theory learned from the practical to different contexts. These go beyond Core and Supplement level, and the requirements of the syllabus, and can be used as stretch activities.

Completing the investigations
At the start of each investigation, we have provided a brief piece of context to help explain how the
science behind the practical ties into the wider syllabus. Key terms and equations that are relevant to each investigation are also provided.
The aim of each practical is then given, along with a list of apparatus needed to complete the practical as suggested. Your teacher will inform you whether they have decided to change any of the equipment and if the method needs to be adapted as a result.
Before you begin the practical and start on the method, it is vital that you read and understand the safety guidance, as well as taking any necessary precautions. Once you have carried out a risk assessment and made everything safe, you should check with your teacher that it is appropriate to begin working through the method.
The method is presented as step-by-step instructions and you should read it through at least once before starting, making sure you understand everything. Then, ensuring that you don’t miss anything out, you should work through the practical safely. Tips may be provided to help with particularly problematic steps.
Questions and answers
Within each practical, there are clear sections laid out for observations where you should record your results as you complete the practical. Scaffolded questions are also provided to help you develop conclusions and evaluate the success of the experiment.
At the end of the book are past paper questions that relate to the practicals within this book and provide useful exam practice. Your teacher may decide to set this as part of the lesson, or at a later date.
Answers to all of the questions are provided in the accompanying Cambridge IGCSE Physics Teacher’s Guide with Boost Subscription.

Experimental skills and abilities

Skills for scientific enquiry
The aim of this book is to help you develop the skills and abilities needed to perform practical laboratory work. This section begins with an introduction to some common apparatus and measuring techniques. Some methods for making and recording accurate measurements will follow, along with descriptions of how to handle the observations and data you have collected. At the end of the section, we discuss how to plan, carry out and evaluate an investigation. You should then be ready to work successfully through the experiments and laboratory activities in this book.

Safety
Here are a few simple precautions to help ensure your safety when carrying out physics experiments in the laboratory.

l Always wear shoes: this will mean that your feet are protected if a heavy weight falls on them.
l Turn off the power: when connecting electrical circuits, ensure the power is turned off. When you are ready to take measurements, check the circuit and set the power to a low output before turning it on. Large currents can cause burns and electric shocks, and damage sensitive meters. Switch the power off between readings.
l Set up circuits away from water (taps or sink) and do not touch electrical equipment with wet hands.
l Take care with hot liquids and solids: set them in a safe position where they will not be accidentally knocked over; handle them with caution to avoid burns.
l Protect eyes: avoid looking directly into a laser beam or ultraviolet lamp; radiation can damage your eyes so wear eye protection when instructed.
l Take care with toxic materials: materials such as mercury are toxic; take care not to allow a mercury thermometer to roll onto the floor and break.
l Tie back long hair to prevent it being caught in a flame, for example.
l Put away personal belongings: leave them in a sensible place so that no one will trip over them!

Special note to teachers
We believe that the experiments can be carried out safely in school laboratories. However, it is the responsibility of the teacher to make the final decision depending on the circumstances at the time. Teachers must ensure that they follow the safety guidelines set down by their employers, and a risk assessment must be completed for any experiment that is carried out. Teachers should draw students’ attention to the hazards involved in the particular exercise to be performed. The hazards are shown within the ‘Safety guidance’ section of the individual practicals.
It is recognised that, in some instances, there may not be sufficient apparatus to carry out a class practical and in such cases, the experiment could be carried out as a demonstration. (Consider using some student assistance.)
In some cases, certain pieces of apparatus may not be available. If possible, use alternatives, as long as the safety precautions are not overlooked. For example, a stopwatch could be used in place of an automatic timer. If you substitute equipment, consider the accuracy of the alternative; it is usually much lower than the equipment suggested.


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