Powerpoint lecture covering the following in a modern, concise format: Specification Point 7.17 - Know that nuclear reactions, including fission, fusion and radioactive decay, can be a source of energy. Specification Point 7.18 - Understand how a nucleus of U-235 can be split by collision with a neutron, and that this process releases energy as kinetic energy of the fission products. Specification Point 7.19 -Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons. Specification Point 7.20 - Describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei. Specification Point 7.21 - Describe the role played by the control rods and moderator in the fission process. Specification Point 7.22 - Understand the role of shielding around a nuclear reactor. Specification Point 7.23 - Explain the difference between nuclear fusion and nuclear fission. Specification Point 7.24 - Describe nuclear fusion as the creation of larger nuclei resulting in a loss of mass from smaller nuclei, accompanied by a release of energy. Specification Point 7.25 - Know that fusion is the energy source for stars. Specification Point 7.26 - Explain why nuclear fusion does not happen at low temperatures and pressures, due to electrostatic repulsion of protons. Complete set of Chapter 7 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 29 - Radioactivity Part 2. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 7.10 - Explain the sources of background radiation from Earth and space. Specification Point 7.11 - Know that the activity of a radioactive source decreases over a period of time and is measured in becquerels. Specification Point 7.12 - Know the definition of the term half-life and understand that it is different for different radioactive isotopes. Specification Point 7.13 - Use the concept of the half-life to carry out simple calculations on activity, including graphical methods. Specification Point 7.14 - Describe uses of radioactivity in industry and medicine. Specification Point 7.15 - Describe the difference between contamination and irradiation. Specification Point 7.16 - Describe the dangers of ionising radiations and how to dispose of radioactive waste. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 7.10 - Explain the sources of background radiation from Earth and space. Specification Point 7.11 - Know that the activity of a radioactive source decreases over a period of time and is measured in becquerels. Specification Point 7.12 - Know the definition of the term half-life and understand that it is different for different radioactive isotopes. Specification Point 7.13 - Use the concept of the half-life to carry out simple calculations on activity, including graphical methods. Specification Point 7.14 - Describe uses of radioactivity in industry and medicine. Specification Point 7.15 - Describe the difference between contamination and irradiation. Specification Point 7.16 - Describe the dangers of ionising radiations and how to dispose of radioactive waste. Complete set of Chapter 7 Lectures are available.

Complete set of companion PDF worksheets for Edexcel IGCSE Physics (4PH1) Chapter 7 - Radioactivity. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Three worksheets included: 28 - Radioactivity Part 1 29 - Radioactivity Part 2 30 - Fission and Fusion

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 30 - Fission and Fusion. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 7.17 - Know that nuclear reactions, including fission, fusion and radioactive decay, can be a source of energy. Specification Point 7.18 - Understand how a nucleus of U-235 can be split by collision with a neutron, and that this process releases energy as kinetic energy of the fission products. Specification Point 7.19 -Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons. Specification Point 7.20 - Describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei. Specification Point 7.21 - Describe the role played by the control rods and moderator in the fission process. Specification Point 7.22 - Understand the role of shielding around a nuclear reactor. Specification Point 7.23 - Explain the difference between nuclear fusion and nuclear fission. Specification Point 7.24 - Describe nuclear fusion as the creation of larger nuclei resulting in a loss of mass from smaller nuclei, accompanied by a release of energy. Specification Point 7.25 - Know that fusion is the energy source for stars. Specification Point 7.26 - Explain why nuclear fusion does not happen at low temperatures and pressures, due to electrostatic repulsion of protons. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 7.17 - Know that nuclear reactions, including fission, fusion and radioactive decay, can be a source of energy. Specification Point 7.18 - Understand how a nucleus of U-235 can be split by collision with a neutron, and that this process releases energy as kinetic energy of the fission products. Specification Point 7.19 -Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons. Specification Point 7.20 - Describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei. Specification Point 7.21 - Describe the role played by the control rods and moderator in the fission process. Specification Point 7.22 - Understand the role of shielding around a nuclear reactor. Specification Point 7.23 - Explain the difference between nuclear fusion and nuclear fission. Specification Point 7.24 - Describe nuclear fusion as the creation of larger nuclei resulting in a loss of mass from smaller nuclei, accompanied by a release of energy. Specification Point 7.25 - Know that fusion is the energy source for stars. Specification Point 7.26 - Explain why nuclear fusion does not happen at low temperatures and pressures, due to electrostatic repulsion of protons. Complete set of Chapter 7 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 6.8 - Know that an electric current in a conductor produces a magnetic field around it. Specification Point 6.12 - Understand why a force is exerted on a current-carrying wire in a magnetic field, and how this effect is applied in simple D.C. electric motors and loudspeakers. Specification Point 6.13 - Use the left-hand rule to predict the direction of the resulting force when a wire carries a current perpendicular to a magnetic field. Specification Point 6.14 - Describe how the force on a current-carrying conductor in a magnetic field changes with the magnitude and direction of the field and current. Specification Point 6.15 - Know that a voltage is induced in a conductor or a coil when it moves through a magnetic field or when a magnetic field changes through it and describe the factors that affect the size of the induced voltage. Specification Point 6.16 - Describe the generation of electricity by the rotation of a magnet within a coil of wire and of a coil of wire within a magnetic field, and describe the factors that affect the size of the induced voltage. Complete set of Chapter 6 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 27 - Electromagnets Part 2. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 6.9P - Describe the construction of electromagnets. Specification Point 6.10P - Draw magnetic field patterns for a straight wire, a flat circular coil and a solenoid when each is carrying a current. Specification Point 6.11P - Know that there is a force on a charged particle when it moves in a magnetic field as long as its motion is not parallel to the field. Specification Point 6.17P - Describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides. Specification Point 6.18P - Explain the use of step-up and step-down transformers in the large-scale generation and transmission of electrical energy. Specification Point 6.19P - Know and use the relationship between input and output voltages and the turns ratio for a transformer. Specification Point 6.20P - Know and use the relationship between input power and output power. Complete set of Chapter 6 Worksheets are available.

Complete set of companion PDF worksheets for Edexcel IGCSE Physics (4PH1) Chapter 6 - Magnetism and Electromagnetism. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Three worksheets included: 25 - Magnetism 26 - Electromagnets Part 1 27 - Electromagnets Part 2

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 6.9P - Describe the construction of electromagnets. Specification Point 6.10P - Draw magnetic field patterns for a straight wire, a flat circular coil and a solenoid when each is carrying a current. Specification Point 6.11P - Know that there is a force on a charged particle when it moves in a magnetic field as long as its motion is not parallel to the field. Specification Point 6.17P - Describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides. Specification Point 6.18P - Explain the use of step-up and step-down transformers in the large-scale generation and transmission of electrical energy. Specification Point 6.19P - Know and use the relationship between input and output voltages and the turns ratio for a transformer. Specification Point 6.20P - Know and use the relationship between input power and output power. Complete set of Chapter 6 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.9P - Describe the construction of electromagnets. Specification Point 6.10P - Draw magnetic field patterns for a straight wire, a flat circular coil and a solenoid when each is carrying a current. Specification Point 6.11P - Know that there is a force on a charged particle when it moves in a magnetic field as long as its motion is not parallel to the field. Specification Point 6.17P - Describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides. Specification Point 6.18P - Explain the use of step-up and step-down transformers in the large-scale generation and transmission of electrical energy. Specification Point 6.19P - Know and use the relationship between input and output voltages and the turns ratio for a transformer. Specification Point 6.20P - Know and use the relationship between input power and output power. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.8 - Know that an electric current in a conductor produces a magnetic field around it. Specification Point 6.12 - Understand why a force is exerted on a current-carrying wire in a magnetic field, and how this effect is applied in simple D.C. electric motors and loudspeakers. Specification Point 6.13 - Use the left-hand rule to predict the direction of the resulting force when a wire carries a current perpendicular to a magnetic field. Specification Point 6.14 - Describe how the force on a current-carrying conductor in a magnetic field changes with the magnitude and direction of the field and current. Specification Point 6.15 - Know that a voltage is induced in a conductor or a coil when it moves through a magnetic field or when a magnetic field changes through it and describe the factors that affect the size of the induced voltage. Specification Point 6.16 - Describe the generation of electricity by the rotation of a magnet within a coil of wire and of a coil of wire within a magnetic field, and describe the factors that affect the size of the induced voltage. Complete set of Chapter 6 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 26 - Electromagnets Part 1. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 6.8 - Know that an electric current in a conductor produces a magnetic field around it. Specification Point 6.12 - Understand why a force is exerted on a current-carrying wire in a magnetic field, and how this effect is applied in simple D.C. electric motors and loudspeakers. Specification Point 6.13 - Use the left-hand rule to predict the direction of the resulting force when a wire carries a current perpendicular to a magnetic field. Specification Point 6.14 - Describe how the force on a current-carrying conductor in a magnetic field changes with the magnitude and direction of the field and current. Specification Point 6.15 - Know that a voltage is induced in a conductor or a coil when it moves through a magnetic field or when a magnetic field changes through it and describe the factors that affect the size of the induced voltage. Specification Point 6.16 - Describe the generation of electricity by the rotation of a magnet within a coil of wire and of a coil of wire within a magnetic field, and describe the factors that affect the size of the induced voltage. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.18 - Know and use the relationship between weight, mass and gravitational field strength. Specification Point 1.19 - Know that the stopping distance of a vehicle is made up of the sum of the thinking distance and the braking distance. Specification Point 1.20 - Describe the factors affecting vehicle stopping distance, including speed, mass, road condition and reaction time. Specification Point 1.21 - Describe the forces acting on falling objects and explain why falling objects reach a terminal velocity. Complete set of Chapter 1 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 6 - Hooke’s Law. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.22 - Practical: investigate how extension varies with applied force for helical springs, metal wires and rubber bands. Specification Point 1.23 - Know that the initial linear region of a force-extension graph is associated with Hooke’s law. Specification Point 1.24 - Describe elastic behaviour as the ability of a material to recover its original shape after the forces causing deformation have been removed. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 5 - Gravity, Weight and Drag. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.18 - Know and use the relationship between weight, mass and gravitational field strength. Specification Point 1.19 - Know that the stopping distance of a vehicle is made up of the sum of the thinking distance and the braking distance. Specification Point 1.20 - Describe the factors affecting vehicle stopping distance, including speed, mass, road condition and reaction time. Specification Point 1.21 - Describe the forces acting on falling objects and explain why falling objects reach a terminal velocity. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 - Use the following units: ampere, coulomb, joule , ohm, second, volt and watt. Specification Point 2.2 - Understand how the use of insulation, double insulation, earthing, fuses and circuit breakers protects the device or user in a range of domestic appliances. Specification Point 2.3 - Understand why a current in a resistor results in the electrical transfer of energy and an increase in temperature, and how this can be used in a variety of domestic contexts. Specification Point 2.14 - Know that current is the rate of flow of charge. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.4 - Know and use the relationship between power, current and voltage and apply the relationship to the selection of appropriate fuses. Specification Point 2.5 - Use the relationship between energy transferred, current, voltage and time. Specification Point 2.6 - Know the difference between mains electricity being alternating current (A.C.) and direct current (D.C.) being supplied by a cell or battery. Complete set of Chapter 2 Lectures are available.