Students can practise calculating surface area to volume ratios. Answers are provided.

PowerPoint that covers the following learning objectives: State that in females the sex chromosomes are XX and in males they are XY. Carry out a genetic cross to show sex inheritance. Define key terms allele, dominant allele, recessive allele, heterozygous, homozygous, genotype and phenotype. This is made for a GCSE biology class. Includes questions, answers, diagrams to practice and explanations.

PowerPoint that covers the following learning objectives: Define conservation of mass. Safely complete an experiment on conservation of mass. Explain any observed changes in mass in non-enclosed systems during a chemical reaction given the equation for the reaction and explain these changes in terms of the particle model. Includes an experiment, examples, diagrams, questions and answers. This is made for a GCSE chemistry class. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

PowerPoint that covers the following learning objectives: State that aluminium can be extracted from aluminium oxide using electrolysis and write the overall word equation. Describe the electrolysis of aluminium oxide. Explain the classification of the reactions at each electrode as oxidation or reduction by writing half equations. Explain why cryolite is added to aluminium oxide in the industrial extraction of aluminium. Includes questions, answers, diagrams, explanations and a quiz. This is made for a GCSE chemistry class. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

Questions and answers on bonding and structure in GCSE chemistry.

-Recognise hazard symbols and match the symbol to its meaning. -Describe safety precautions that should be taken when handling substances, based on their hazard symbols.

Learning objectives: Define what is meant by an alkene. State the names and describe the first four alkenes. Describe a chemical test to show an alkene is present. Define cracking. Describe the process of cracking, including conditions.

Learning objectives: To be able to describe what food webs show. To be able to combine food chains to form a food web. To be able to explain why a food web gives a more accurate representation of feeding relationships than food chains.

Learning objectives: To be able to describe what a physical property is. To be able to define common properties. To be able to describe the properties of metals and non-metals.

Learning objectives: Describe the stages involved in a reflex action. Identify stimuli, receptors, coordination centres, and effectors in examples of reflex actions.

Learning objective: Describe uses of radiation.

Learning Objectives: • Define what work is in a scientific context. • Calculate the work done by a force. • Use the equation for work done to calculate distances or size of forces.

• Describe the model of the Solar System. • Describe how objects in the Solar System are arranged.

Explain simply why we have day and night. Explain why seasonal changes happen.

State what energy dissipation means. Identify and calculate useful energy and wasted energy from input and output energies. Explain what efficiency means in terms of wasted and useful energy. Calculate % efficiency using useful output and total input energies.

• Describe the effect of changing the mass or the force acting on an object on the acceleration of that object. • Calculate the force required to cause a specified acceleration on a given mass. • Perform calculations involving the rearrangement of the F = ma equation.

Full lesson PowerPoint for ionic bonding. This is made for a KS4 level chemistry class. The following learning objectives are covered: Define ionic bonding. Work out the charge on the ions of metals and non-metals from the group number of the element limited to Group 1,2, 6 and 7. Draw dot and cross diagrams for ionic compounds formed by metals in Groups 1 and 2 with non-metals in Groups 6 and 7. Includes examples, diagrams, questions and answers.

PowerPoint that covers law of reflection, virtual images, specular reflection and diffuse reflection. This is made for a KS3 level class. Includes diagrams, class practical (or demonstration/video), questions, answers and assessment for learning opportunities.