This PowerPoint presentation with worked examples and student activities covers: Topic 2.1 of Science Fundementals of the OCR Applied Science Spec. Types of mixtures to include solutions, colloids and suspensions Difference between colloids and suspensions in terms of particle size Uses of common colloids in nature and medicine Types of colloids to include aerosols, emulsions, foams, gels and sols Significance of colloids in nature and medicine Alloys as mixtures of metals The character and features of alloys Uses of common alloys to include amalgam, solder, bronze, titanium alloy

This PowerPoint presentation with worked examples and student activities covers: Topic 1.1 of Science Fundementals of the OCR Applied Science Spec. nucleus contains protons and neutrons surrounded by electrons relative masses and charges nuclear and atomic diameters nucleon number, proton number and isotopes proton number defines the type of atom nuclear notation attractive and repulsive forces within the nucleus

This PowerPoint presentation with worked examples and student activities covers: Topic 2.2 of Module 1: Science Fundementals of the OCR Applied Science Spec. Oxidation and reduction (redox) reactions Addition reactions of alkenes to include full balanced symbol equations Substitution reactions of alkanes and haloalkanes to include full balanced equations Addition polymerisation to include identification of monomers and repeating units Condensation polymerisation to include identification of monomers and repeating units Definition of a radical The role played by UV light in producing chlorine radicals from CFCs in the depletion of the ozone layer Equations to show how chlorine radicals can destroy many ozone molecules Displacement reactions to include full balanced equations for metals and halogens.

This PowerPoint presentation with worked examples and student activities covers: Topic 4.4 of Module 1: Science Fundamentals of the OCR Applied Science Spec. Complex carbohydrates (starch, glycogen, cellulose) • Carbohydrates found as monosaccharides, disaccharides, or polysaccharides (monomers, dimers or polymers) • Monomers held together by glycosidic bonds to form dimers and polymers, via condensation reactions • Monosaccharides include glucose, fructose and galactose • Disaccharides include maltose, sucrose and lactose • Polysaccharides include starch, glycogen and cellulose • Cellulose is found in plant cell walls where it provides strength/support and pliability • Starch and glycogen are energy sources Proteins and peptides from amino acids • Dipeptides are formed from two amino acids joined by a peptide bond, via a condensation reaction • Polypeptides are chains of amino acids joined by peptide bonds • Proteins/polypeptides have physiological or functional roles, including enzymes, carrier proteins in the plasma membrane, and structural roles, including collagen and elastin fibres in connective tissue Lipids from fatty acids, glycerol and phosphorus compounds • Monoglycerides, diglycerides and triglycerides are esters of fatty acids and glycerol • An ester bond forms between each fatty acid and the glycerol, via condensation reactions • Phospholipids contain glycerol plus two fatty acids and a phosphate group • Lipids act as an energy source within cells, as an insulation layer around animal organs, in the myelin sheath (found around some nerve fibres/axons) to increase speed of nerve transmission • Phospholipids form a bilayer in the plasma membrane Protein synthesis (transcription, translation) RNA, messenger, ribosomal and transfer • The nucleic acids, DNA and RNA, are polymers of nucleotides • Peptide bonds form between amino acids to create polypeptide chains/proteins • Recall a simple description of protein synthesis

This PowerPoint presentation with worked examples and student activities covers: Topic 4.1 of Module 1: Science Fundamentals of the OCR Applied Science Spec. • Alkanes as saturated hydrocarbons containing single C-C and C-H bonds • Alkenes as unsaturated hydrocarbons containing a C=C double bond • Alkynes as unsaturated hydrocarbons containing a C ≡ C triple bond • Name and draw structural and skeletal formulae of the first four members of alkanes, alkenes and alkynes • Aldehydes and ketones as organic compounds containing the C=O group • Name and draw the structural formulae of the first four aldehydes and the first two ketones • Alcohols as organic compounds containing the OH group • Name and draw structural and skeletal formulae of the first four alcohols • Conversion of alcohols to form aldehydes and ketones is classified as an oxidation reaction • Name and draw structural and skeletal formulae of the first four carboxylic acids • Reaction of carboxylic acids with an alkali, to include full equations using structural formulae • Name and draw structural and skeletal formulae of the four C4H8O2 esters • How an ester can be made from a carboxylic acid and an alcohol

This PowerPoint presentation with worked examples and student questions covers: • Reaction profiles for exothermic and endothermic • Energy stores of particles and surroundings • Activation energy • Describing the main features of reaction profiles.

This PowerPoint presentation with worked examples and student questions covers: Definitions for anions, cations, anodes, cathodes. Tests for carbonate ions Tests for sulfate ions Tests for halide ions

This PowerPoint presentation with worked examples and student activities covers: Topic 4.3 of Module 1: Science Fundamentals of the OCR Applied Science Spec. • Stating definitions and comparing structural isomers and stereoisomers. • Condensed structural formula • Lines of symmetry for structural isomers • Cis- and Trans isomers • Optical isomers as non-superimposable mirror images. • Wedge and Dash Notation • Identifying chiral centres (asymmetric carbons) • Le Bel-van’t Hoff rule • Determining the maximum number of isomers.

OCR AS Chemistry: 13.5 Polymerisation of Alkenes This PowerPoint is a whole lessons included with student activities, animated answers, homework questions with answers provided. This lesson covers: Monomers and repeat units Addition Polymerisation for: Polyethene Polypropene Polylactate Polystyrene Polyvinyl Chloride (PVC) Environmental Concerns from polymers including: Combustion of polymers recycling PVC biogradeable bioplastics photodegradable polymers feedstock recycling

OCR A level Chemistry: 26.2 Identifying Aldehydes and Ketones This PowerPoint is a whole lesson included with student activities, animated answers, homework questions with answers provided. This lesson covers: Testing for Carbonyl Groups Brady’s reagent - 2,4-dinitrophenylhydrazine - 2,4-DNP Distinguishing between Aldehydes and Ketones Tollen’s reagent - silver nitrate in aqueous ammonia

OCR AS Chemistry: 16.1 Practical Techniques in Organic Chemistry This PowerPoint is a whole lessons included with student activities, animated answers, homework questions with answers provided. This lesson covers: Heating under reflux Distillation Re-distillation Purifying Organic Products Removing impure acids from organic compounds Drying agents

OCR A level Chemistry: 29.6 Combined Techniques This PowerPoint is a whole lesson included with student activities, animated answers, homework questions with answers provided. This lesson covers: Percentage yield to determine empirical formula Mass spectra Infrared spectra Carbon-13 NMR spectra Proton NMR spectra

This PowerPoint presentation with worked examples and student questions covers: • Solids, liquids, and gases • Scientific models as a concept

This PowerPoint presentation with worked examples and student questions covers: • Differences between physical and chemical changes • Explain why physical changes are generally easier to reverse

This PowerPoint presentation with worked examples and student questions covers: • Describing the limitations of the model: lack of forces between particles, size of particles, and space between the particles. • Mathematically comparing sizes and distances of particles

This PowerPoint presentation with worked examples and student questions covers: • Scientific models as a concept • Structure of the atom • Relative mass and charge of subatomic particles • Bond length of atoms and molecules

This PowerPoint presentation with worked examples and student questions covers: • Definitions of elements, isotopes, and ions • State mass number, atomic number, and chemical symbols • Calculate the number of neutrons