This is the Biology version of the Practical handbook. Sections J to P are particularly useful for students and could be printed as a student booklet by schools. The information in this document is co rrect, to the best of our knowledge as of September 2016. This document is expected to be revisited throughout the lifetime of the specification. Please check you have the latest version by visiting our website. Thank you to all the teachers, technicians and associates who have commented on previou...

AQA-Scheme of work A-level Business-Graded A+ 2022

This is the Biology version of the Practical handbook. Sections J to P are particularly useful for students and could be printed as a student booklet by schools. The information in this document is correct, to the best of our knowledge as of September 2016. This document is expected to be revisited throughout the lifetime of the specification. Please check you have the latest version by visiting our website. Thank you to all the teachers, technicians and associates who have commented on previous...

Level based on response marking instructions Level based on response mark schemes are broken down into levels, each based on which has a descriptor. The descriptor for the level shows the average performance for the level. There are marks within each level. Before you apply the mark scheme to a student’s answer read through the answer and annotate it (as instructed) to show the qualities that are being looked for. You can then apply the mark scheme. Step 1 Determine a level Start a...

QUESTIONS AND ANSWERS

Define the term enthalpy of lattice formation The standard enthalpy change when 1 mole if solid ionic compound is formed from its gaseous ions. Explain why a value for enthalpy of lattice formation of silver iodide based on the perfect ionic model gives a smaller numerical value than the value calculated in the question AgCl contains covalent character Forces/bonds holding lattice together are stronger Identify a reagent that could be used to indicate the presence of iodide ions in an aque...

descriptor for that level. The descriptor for the level indicates the different qualities that might be seen within the student’s answer for that level. If it meets the lowest level then go to the next one and decide if it meets this level, and so on, until you have a match between the level descriptor and the answer. With practice and familiarity you will find that for better answers you will be able to quickly skip through the lower levels based on the mark scheme. When assigning a level...