This revision lesson has been designed to challenge the students on their use of a range of mathematical skills that could be assessed on the AQA GCSE Combined Science papers. The mathematical element of the AQA GCSE Combined Science course has increased significantly since the specification change and therefore success in those questions which involve the use of maths can prove to be the difference between one grade and another or possibly even more. The engaging PowerPoint and accompanying resources contain a wide range of activities that include exam-style questions with displayed mark schemes and explanations so that students can assess their progress. Other activities include differentiated tasks, class discussion points and quick quiz competitions such as “YOU DO THE MATH” and “FILL THE VOID”. The following mathematical skills (in a scientific context) are covered in this lesson: The use of Avogadro’s constant Rearranging the formula of an equation Calculating the amount in moles using mass and relative formula mass Calculating the relative formula mass for formulae with brackets Using the Periodic Table to calculate the number of sub-atomic particles in atoms Changes to electrons in ions Balancing chemical symbol equations Converting between units Calculating concentration in grams per dm cubed and volumes of solutions Calculating size using the magnification equation Using the mean to estimate the population of a sessile species Calculating percentages to prove the importance of biodiversity Calculating percentage change Calculating the acceleration from a velocity-time graph Recalling and applying the Physics equations Understanding prefixes that determine size Leaving answers to significant figures and using standard form Helpful hints and step-by-step guides are used throughout the lesson to support the students and some of the worksheets are differentiated two ways to provide extra assistance. Due to the detail of this lesson, it is estimated that it will take in excess of 3 hours of GCSE teaching time to cover the tasks and for this reason it can be used over a number of lessons as well as during different times of the year for revision.

A fully-resourced lesson which guides students through drawing, writing and recognising the electronic configurations of atoms and ions. The lesson includes an engaging lesson presentation (33 slides), an associated worksheet and a competition worksheet. The lesson begins by introducing the students to the number of electrons that can be held on the first three electron shells. They are then shown how to draw an electronic configuration and write this in brackets form. Students are given the opportunity to apply this knowledge by drawing the configuration of first 20 elements of the Periodic Table. Moving forwards, students are guided to enable them to discover how the electron configuration is linked to the position of an atom in the Periodic Table. The remainder of the lesson focuses on ions and how the configuration of these substances can be recognised. Some time is taken to explain how ions are formed from atoms and the lesson finishes with a competition which challenges students to identify atoms or ions from their configurations to form a word. There are regular progress checks throughout the lesson to allow the students to check on their understanding and a range of quiz competitions to maintain engagement. This lesson has been written for GCSE students but could be used with younger students, especially the initial part of the lesson on atoms and the link to the Periodic Table

This is a fully-resourced lesson which includes an engaging and detailed lesson presentation and differentiated worksheets that together guide students through the key details of endothermic and exothermic reactions. This lesson has been designed for GCSE students but could be used with students entering this topic at A-level who are looking for a recap on the key details. This lesson focuses on a few critical areas of these reactions and those which are often poorly understood. For example, considerable time is taken to ensure that students understand how energy is taken in to break bonds in a reaction and given out when bonds are formed. From this basis, they learn to compare the amount of energy taken in with the amount given out and ultimately determine whether it is an endothermic or exothermic reaction. The format of the lesson is that students are guided through the combustion of methane as an exothermic reaction and shown how to draw reaction profiles and calculate energy changes using the bond energies to prove it is that type of reaction. Having worked with the teacher and each other on this reaction, students are then challenged to bring their skills together to describe, explain and represent an endothermic reaction. If students feel that they will need some assistance on this task, the worksheet has been differentiated so they can still access the learning. There are a number of quick competitions written into the lesson to maintain engagement and also progress checks are found at regular intervals so students can constantly assess their understanding. The lesson finishes with a final game called The E factor which tests the students knowledge from across the whole lesson.

A fully-resourced lesson that uses a range of tasks, understanding checks and quick competitions to guide students through calculating the relative formula mass for substances with a range of chemical formulae. The relative formula mass is required in a lot of calculations, such as those that involve moles, so it is an important skill to get right. Worked examples are used throughout the lesson to visualise the metho for the students. Initially, students will learn how to calculate the mass from simple formulae before helpful hints are provided for harder formulae such as those that contain a bracket. Students are given the chance to apply their knowledge by proving that mass is conserved in a reaction. This lesson has been written for GCSE students but could be used with higher ability KS3 students in lessons that are looking to push knowledge forward

This is an engaging revision lesson which uses a range of exam questions, understanding checks, quick differentiated tasks and quiz competitions to allow students to assess their knowledge of the topic of moles and related topics as covered in the GCSE Chemistry and GCSE Combined Science courses. An understanding of moles and their associated calculations is critical for the success of a student in these two courses. The following topics are covered in this revision lesson: Avogadro’s law and constant Mole calculations involving Avogadro’s constant Mole calculations involving the formula, moles = mass x molar mass Mole calculations involving the constant and the formula Moles in balanced symbol equations and identifying molar ratios of reactants or reactants to products Calculating masses in reactions Gas calculations (molar volume) Concentration of solutions (in mol per decimetre cubed) Students will be engaged through the range of activities which includes quiz competitions such as “Fill the VOID” where students have to complete some equations which have pieces missing and also “In the BALANCE” where students have to balance equations in order to work out the number of moles on each side of the reaction. This lesson can be used at any time during the year as a revision material, in the lead up to mocks or as a final revision lesson before the GCSE terminal exams.

This revision resource contains an engaging and informative PowerPoint (55 slides) and differentiated worksheets that will enable the students to assess their understanding of the topic C9 content of the CIE IGCSE Combined Science specification for examination in June and November 2020 and 2021. The range of exam questions (with explained answers), quick tasks and quiz competitions have been designed to cover as much content as possible but the following topics have received particular attention: • The properties of the alkali metals, halogens and noble gases • Explaining the reactivity of these groups in terms of electron configurations • The transition elements • The arrangement of the Periodic Table • Predicting properties of the undiscovered elements The question sheet about the properties of the different groups has been differentiated three ways so that a range of abilities can access the work

An engaging lesson presentation (67 slides) and associated worksheets that uses a combination of exam questions, quick tasks and quiz competitions to help the students to assess their understanding of the topics found within TOPIC 7 (Organic chemistry) of the AQA GCSE Chemistry specification (specification point C4.7) The topics that are tested within the lesson include: Crude oil, hydrocarbons and alkanes Fractional distillation and petrochemicals Properties of hydrocarbons Cracking and alkenes Alkenes Alcohols Carboxcylic acids Addition polymerisation Condensation polymerisation Students will be engaged through the numerous activities including quiz rounds like “What FRACTION of this is correct” and “Are you on FORM” whilst crucially being able to recognise those areas which need further attention

An engaging lesson presentation (54 slides) and associated worksheets that uses a combination of exam questions, quick tasks and quiz competitions to help the students to assess their understanding of the topics found within unit C8 (Chemical analysis) of the AQA GCSE Combined Science specification (specification point C5.8) The topics that are tested within the lesson include: Pure substances Chromatography Identification of common gases Students will be engaged through the numerous activities including quiz rounds like “Take the CHROMATOGRAPHY hotseat” whilst crucially being able to recognise those areas which need further attention

A fully-resourced lesson which looks at the chemical reaction of cracking and the conditions that are needed for this reaction on both an industrial scale and in a laboratory. The lesson includes an engaging lesson presentation (33 slides) and an associated worksheet containing questions for a progress check. The lesson begins by challenging the students to use their knowledge of alkanes and a given example to work out the name of a 6, 7 and 8 carbon alkane. Students need to be able to name the alkanes and alkenes in order to understand the products of a cracking reaction. A number of quiz competitions are used to introduce both the name of the reaction but also the temperature that is needed when it is carried out on an industrial scale. Students will then be shown a diagram of a cracking experiment in a laboratory so they can discover that a catalyst is also needed. Students will learn, either through carrying out the experiment or through the informative slide, that the product of a cracking reaction is a smaller alkane molecule and a smaller alkene molecule. Time is taken to go back over the meaning of saturated and unsaturated and once the students have been introduced to bromine water, they are challenged to work out what the respective reactions will be when it is added to an alkane and an alkene. The remainder of the lesson focuses on writing word and chemical symbol equations for a cracking reaction. Students will be shown how the second product of a reaction can be worked out when the reactant and first product are provided and then they challenge themselves by trying to write three equations. Understanding checks are written into the lesson at regular places to allow the students to check on their understanding. This lesson has been designed for GCSE students.

A practical based lesson presentation (26 slides) that investigates how increasing the temperature affects the rate of reaction and helps students to explain the trend in the results. Students can either carry out the reaction between sodium thiosulphate and hydrochloric acid or use the results which are provided. The equation to work out the rate of reaction is introduced to the students and they are challenged to plot the results on a line graph. A key term to be used in the explanation is introduced through a quick competition and then students are challenged to explain the trend

This concise lesson presentation (20 slides) guides students through the effect of changing pressure on the position of the equilibrium. The key skill to this topic involves recalling the rule of increasing pressure and being able to recognise how many moles are on each side of the reaction. For this reason, time is taken to remind the students of the meaning of the mole numbers in a reaction and working through an example together so they can see which side will be favoured. The final part of the lesson involves a game called “The PRESSURE is on” where students are in a race against the clock to balance an equation and then work out which way the equilibrium will shift when either the pressure is increased or decreased. This lesson has been written for GCSE students.

A thought-provoking lesson which explores why certain conditions are chosen for reversible reactions. Throughout this lesson, students are challenged to think about the topic in three ways. Of course, they have to consider the chosen conditions from a Scientific angle by knowing how temperature and pressure affect the position of the equilibrium. They must also think about the business (and health) side of the argument by recognising that increased pressures are both dangerous and expensive. Finally, they are taught recognise how the chosen conditions are in fact a compromise which has taken both the Science and business into account. Students are guided through the choice of conditions for the production of methanol so that they can apply their knowledge to the production of ammonia by the Haber process. This lesson has been designed for GCSE students.