Atomic bomb Student activity Play

Atomic spectra Whiteboard presentation Play

Atomic spectra Class activity Play

Atomic spectrum of hydrogen Student activity Play

Atomic states Animation Play

ATP – a carrier of energy Illustration Play

ATP – a transporter of energy in a cell Slideshow Play

ATP – a universal carrier of energy Whiteboard exercise Play

ATP – a universal carrier of energy Student activity Play

ATP – a universal transporter of energy Student activity Play

ATP – the main source of energy in a cell Animation Play

Audible frequency range of humans Slideshow Play

Audible frequency ranges Student activity Play

Autotrophic nutrition and photosynthesis Class activity Play

Autotrophic nutrition and photosynthesis Whiteboard presentation Play

Autotrophs and heterotrophs Animation Play

Avogadro's law Animation Play

Avogadro's number Student activity Play

Bacteria and the energy sources Whiteboard exercise Play

Balance of matter and energy in the environment Slideshow Play

Balance – differences between energy input and energy output Student activity Play

Balance – differences between energy input and energy output Whiteboard exercise Play

Base dissociation constant Kb (1) Student activity Play

Basic constants Chart Play

Benefits and risks of nuclear energy Slideshow Play