The development of life on Earth, common ancestors, sharing DNA, evolution, natural selection and examples, the work of Darwin, Lamarck and Weismann, extinct and endangered soecies, mutating DNA, protecting endangered species, selective breeding, food chains and webs, hormonal and nervous systems, i ...more

The development of life on Earth, common ancestors, sharing DNA, evolution, natural selection and examples, the work of Darwin, Lamarck and Weismann, extinct and endangered soecies, mutating DNA, protecting endangered species, selective breeding, food chains and webs, hormonal and nervous systems, insulin, the reproductive system, conscious and reflex actions....hide

Ecosystems, food chains, energy flow, heterotrophs and autotrophs, efficiency of a food chain, pyramids of number and biomass, soil, water and biomass content of soil, photosynthesis, limiting factors of photosynthesis, storage of glucose, osmosis, the compensation point of water and carbon dioxide, ...more

Ecosystems, food chains, energy flow, heterotrophs and autotrophs, efficiency of a food chain, pyramids of number and biomass, soil, water and biomass content of soil, photosynthesis, limiting factors of photosynthesis, storage of glucose, osmosis, the compensation point of water and carbon dioxide, the greenhouse effect, global warming and its evidence, symbiosis, interdependent relationships, malaria, sickle-cell anaemia, inheritance and the genetics of sickle-cell, the structure of bacteria, fermenters, genetic engineering, genetic modification, insulin, genetic testing, aerobic respiration, anaerobic respiration, effect of exercise, oxygen debt, the four parts of blood, blood types, mixing blood types, blood group genetics, the circulatory system, the heart, arteries and veins, the skeletal system, joints, ligaments and tendons, medical history assessments....hide

The structure of the Earth, the carbon cycle, the nitrogen cycle, chemicals in the air, forces between molecules, water molecules, dissolving crystal lattices, covalent structures, chemicals of the biosphere , balancing equations, extracting metals, calculating percentage mass, life cycle assessment ...more

The structure of the Earth, the carbon cycle, the nitrogen cycle, chemicals in the air, forces between molecules, water molecules, dissolving crystal lattices, covalent structures, chemicals of the biosphere , balancing equations, extracting metals, calculating percentage mass, life cycle assessments, electrolysis, extracting aluminium, properties of metals....hide

Alkanes, alcohols, carboxylic acids, saturated and unsaturated fats, esters, exothermic and endothermic reactions, using catalysts, calculating bond energies, reversible reactions, strong and weak acids, chromatography, Rf values, gas chromatography, standard solutions, titration equations, reliabil ...more

Alkanes, alcohols, carboxylic acids, saturated and unsaturated fats, esters, exothermic and endothermic reactions, using catalysts, calculating bond energies, reversible reactions, strong and weak acids, chromatography, Rf values, gas chromatography, standard solutions, titration equations, reliability, precision, systematic errors, uncertainty, hazard symbols, green chemistry, atom economy, percentage yield, producing ethanol....hide

The basics of waves, the Wave Equation, reflection, refraction, finding the critical angle, wave behaviour, diffraction, constructive and destructive interference, 2-slit interference patterns, the visible spectrum, the electromagnetic spectrum, transmitting information, amplitude and frequency modu ...more

The basics of waves, the Wave Equation, reflection, refraction, finding the critical angle, wave behaviour, diffraction, constructive and destructive interference, 2-slit interference patterns, the visible spectrum, the electromagnetic spectrum, transmitting information, amplitude and frequency modulation, analogue and digital signals....hide

The solar system, the orbit and spin of the Earth, sidereal days, viewing stars, viewing planets, the phases of the moon, lunar and solar eclipses, converging and diverging lenses, ray diagrams, using lenses in telescopes, using mirrors in telescopes, magnification, parallax, measuring distance to s ...more

The solar system, the orbit and spin of the Earth, sidereal days, viewing stars, viewing planets, the phases of the moon, lunar and solar eclipses, converging and diverging lenses, ray diagrams, using lenses in telescopes, using mirrors in telescopes, magnification, parallax, measuring distance to stars using their brightness, the Curtis-Shapley debate, Hubble's Law, gas pressure, particle motion in gases, kinetic theory, the pressure-temperature law, the structure of the sun, absorption and emission spectra, the life cycle of a star, nebulae, main sequence stars, red giants, white dwarfs, supernovae and black holes, the Rutherford Scattering Experiment, the structure of the atom, observing the universe, optical vs radio telescopes, the Hubble Space Telescope....hide