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

Basic constants Chart Play

Benefits and risks of nuclear energy Slideshow Play

Bernoulli's equation for constant potential energy of a fluid Student activity Play

Bernoulli's equation for constant potential energy of a fluid Slideshow Play

Bernoulli's equation for constant potential energy of a fluid Whiteboard exercise Play

Bernoulli's Principle Slideshow Play

Bernoulli's Principle Whiteboard exercise Play

Bernoulli's Principle Student activity Play

Bernoulli's Principle Slideshow Play

Beta decay Animation Play

Beta radiation Animation Play

Binding energy Animation Play

Binding energy Student activity Play