Sugar production in wheat; crop yield and carbon dioxide; testing for photosynthesis; greenhouse pests; tropical trees; paper products; fungal fermenters; mycoprotein make-up; yeast fermentation and temperature; dietary calcium; the energy content of peanuts; breast feeding; food for thought; dental decay; skin and temparature control; the effects of ultra-violet light; the effects of smoking; breathing and exercise; kidney function; human reproduction; exchange at the placenta; testing during pregnancy; human growth and development; world population growth; genetic dental decay; the inheritance of cystic fibrosis; rusting; natural gas; fibres; petrochemicals; malachite; water; iron and steel; aluminium compounds; structure; salt; indigestion; bicarbonate of soda; aluminium; fuels; reaction rate; metals and non-metals; fertilizers; water supplies; hard water; carbon dioxide; coal; animals keeping warm; cooling by evaporation; home insulation; wind systems; heat pipe; engine cooling; uses of hot water from power stations; solar energy; alternative energy sources; electrical safety cut-out; hydro-electric power; temperature controlled switch; safety switches for workshop power supply; overhead line tester; car starter motor; tranformers; car metal detector; ageing eyesight; car headlight decision; satellite communication; an engineer use of ultra-sound; demolition of old buildings; a deliberate car crash!; safety in cars; friction - use and nuisance; radioactive waste disposal; radioactivity in medicine; radioactivity in engineering; pollution at sea; fresh water from sea water; sewage and health; lead pollution; acid rain; ozone; electrons and ions; York Minster; batteries; exercise and energy; compound fertilizers; the national grid; vacuum of plastics; green petrol; bulk milk transport; circulation systems; washing and cleaning; domestic water tank; tooth and jaw; health and beauty; radiation and life; ultra-sound during pregnancy; answers to numerical questions.
