A change in speed during the passage to a different medium Animation Play

A change in speed during the passage to a different medium Whiteboard exercise Play

A change in the medium of wave propagation Simulation Play

A change in the medium of wave propagation Whiteboard exercise Play

A change in the medium of wave propagation Student activity Play

A change of medium Student activity Play

A change of medium Animation Play

A change of medium Simulation Play

A change of medium Whiteboard exercise Play

A change of nutrient in the culture medium Animation Play

A laser Student activity Play

A plate Animation Play

A plate Student activity Play

A plate Simulation Play

A plate Whiteboard exercise Play

A spoon in a glass of water Animation Play

Ability to colour litmus red Animation Play

Absorption spectra Student activity Play

Acid rain destroys forests Animation Play

Acid-base indicators Chart Play

Acidic amino acids Slideshow Play

Acidic foods Illustration Play

Acidic oxides Animation Play

Acidic oxides Animation Play

Acidic properties Whiteboard exercise Play