IGCSE Solar System animated powerpoint. Distinguishing between the terrestrials, asteroids, gas giants, ice giants, comets and meteoroids. Planetary orbital data. Mass and radius vs gravitational field strength. Gravitational force and orbital speed. 22 slides.

IGCSE Force & Pressure, animated powerpoint. Force and pressure in a solid, liquid and a gas. ‘Head’ of pressure, and transmission of pressure by a fluid. Measuring pressure with a barometer and a manometer. Boyle’s Law and scuba diving. 22 slides.

IGCSE Physics - Waves Introduction, covering the classification and descriptive terms for waves. Introducing transverse waves (waves on a string, light waves), longitudinal waves (sound waves) and rotary waves (ocean waves). Introducing the wave speed formula, standing waves, wave interference, the rules for reflection and refraction, diffraction and the Doppler effect. (16 slides.)

IGCSE Radioactivity, animated powerpoint. Unstable nuclei, alpha/beta/gamma decay, decay equations, half-life, Ba-137m experiment, radioisotope uses, ionisation smoke detector, carbon-dating, background radiation, harmful effects of radiation, safety precautions. 34 slides.

The Chernobyl nuclear powerplant disaster of April 1986. Reactor construction & design, and control rod flaws. The planned power-down & start of the test, the power-down overshoot and xenon poisoning that led to the power surge and explosion. The alarm bells in Europe. The fall-out, site containment, mass evacuation, prevention of a possible follow-on corium meltdown event, and clean-up operation by the ‘liquidators’. The 1986 ‘sarcophogus’ and the 2010 ‘new safe confinement’ arch. 12 pages (incl. 5 maps, 6 schematic diagrams, 10 contemporary and 5 other photos).

IGCSE Physics - Line of Force and Motion. Animated powerpoint, introducing torque/moment, the lever, centre of mass and centre of gravity, Fosbury flop, Earth-Moon barycentre, conditions for equilibrium, balance and stability, tipping angle, boat buoyancy, car rolling and pitching, fork-lift trucks and cranes ! 33 slides.

Electrostatics, voltage and current, dangers and protection for devices and humans, measuring voltage, current, power and energy, series and parallel circuit resistance, introducing variable resistors, NTC thermistors, LDRs, diodes, capacitors, relays, transformers, rectifiers and inverters.

(I)GCSE Newton’s Laws of Motion animated powerpoint. Starting with inertia, through momentum and impulse, Newton’s Laws of Motion are introduced, with 5 worked examples. 10 slides.

IGCSE Physics - Electromagnetism. Electrons in motion create magnetic fields, with a relationship between current and field directions given by the ‘corkscrew’ rule. Introducing solenoid electromagnets. Basics of d.c. electric motors and Fleming’s Left Hand (motor) rule for the FBI directions (force (F), field (B) and current (I)). Basics of electric generators and Fleming’s Right Hand (generator) rule.

IGCSE Optical Fibres. Animated powerpoint covering the benefits of fibre optics over copper wire, basic construction and network infrastructure. 11 slides.

Summary of the Hubble Expansion and the Hubble-Lamaitre Law of linear proportionality between recessional velocity and distance. The predicted collision between the Andromeda and Milky Way galaxies. The predicted timetable for the Sun’s transition to red and white dwarf status and impact for Earth. 2 sides.

Introduction to the Cosmic Background Radiation (‘CBR’) that goes with the Big Bang. Briefly summarising the Big Bang and the search for & confirmation of CBR. 2 sides.

IGCSE Atomic Structure, animated powerpoint. Electrons, protons & neutrons. Introducing Isotopes, Atomic weight, the Billiard Ball model, the Plum pudding model, the Gold Foil experiments, the Nuclear model, the Electron Shell model & electron configuration. 22 slides.