Half-life graphs REVISION

This short revision lesson (@10-15 minutes) reminds students of the method (using a pencil and ruler) to find the half-life on a decay curve. The lesson has been primarily designed for use with those students taking the AQA Combined Science FT in the lead up to mock and GCSE examinations, but is also suitable for students taking the HT, or separate physics.

Although these half-life graph questions are fairly straightforward, they tend to be answered poorly, due to an element of laziness or lack of understanding. Therefore, this lesson walks students through the 3 key steps involved in finding the half-life from a decay curve. Once the method has been modelled using an example question, students are then challenged to answer a series of questions and all answers are embedded into the PowerPoint. The key points associated with the topic have also been displayed on a resource which can be kept with the understanding checks for use in the final days and hours before the exam.

Other short revision lessons have been uploaded, including pure metals vs alloys, percentage by mass in compounds, and mitosis vs meiosis.