Practice calculating number of moles, relative formula mass and mass with these tiered questions. Answers included. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

Learning objectives: To describe how temperature affects the rate of reaction. To use collision theory to explain how changing temperature alters the rate of reaction.

Describe the difference between mass and weight. Describe the forces acting on an object falling through a fluid. Explain what terminal velocity is and when it is reached.

• Define what the centre of mass is and identify where it would be in a range of simple shapes. • State that a suspended object will come to rest so that the centre of mass lies below the point of suspension. • Describe an experimental technique to determine the centre of mass of an object with an irregular shape. • Compare the stability of objects to the position of their centre of mass.

PowerPoint that covers the following learning objectives: Describe electrolysis in terms of movement of ions when an ionic compound is molten. Predict the products at each electrode for the electrolysis of a molten ionic compound. Explain whether the reactions at each electrode are oxidation or reduction. Write half equations for oxidation and reduction reactions. This includes diagrams, questions, answers and explanations. This is made for a GCSE chemistry class. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

Practice calculating the percentage by mass of an element in a compound with these tiered questions. Answers included. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

PowerPoint that covers the following learning objectives: Define relative atomic mass, Ar. Use the periodic table to find the relative atomic mass of all elements. Calculate the relative formula mass for familiar compounds when the formula is supplied and is with or without brackets. Calculate the percentage mass of an element in a compound. Includes explanations, examples, 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: Describe the reaction between metals and oxygen and write the word and symbol equation for this. Describe the reaction between metals and water and write the word and symbol equation for this. Deduce the order of reactivity for metals reacting with oxygen and with water. Includes questions, answers, word equation practice and chemical symbol equation practice. This is made for a GCSE chemistry class.

Learning Objectives: State that materials are made up of particles. Describe how the features of the particles can affect the properties. Evaluate particle models.

Learning objectives: Explain the differences between complete and incomplete combustion. Write a word equation to describe the complete combustion of a hydrocarbon. Describe how to test for the products of complete combustion. Write word equations to describe the incomplete combustion of a hydrocarbon. Write balanced symbol equations for the complete combustion of hydrocarbons. Explain in detail how the production of carbon monoxide in incomplete combustion can be lethal.

PowerPoint that covers the following learning objectives: Investigate how light travels through a lens. Describe the difference between a convex lens and a concave lens. Identify the focal point in a light ray diagram of a convex lens. This is made for a KS3 science class. Includes questions, answers, diagrams and link to a virtual simulation.

PowerPoint that covers the 5 energy stores, 4 energy transfers and the principle of conservation of energy. This is made for a KS3 level class. Includes diagrams, questions, answers and a practical activity that can be done as a class or demonstration by the teacher.

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.

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

To define rate of reaction and the units for rate of reaction. To plot and use a graph to calculate the gradient to measure the initial rate of reaction. To calculate the gradient of a tangent to the curve on these graphs as a measure of rate of reaction at a specific time.

Calculate the resultant force when 2 forces act on an object at an angle.

Links to videos for GCSE Chemistry revision.

Practice finding the Ar of an element and calculating the Mr of a molecule or chemical formula with these tiered questions. Answers included

Includes testing for: Cations Anions Gas tests Test for Water Testing for Purity of Water Flame Tests Question on one side, answer on the other. Print double sided (flip along long side of paper).