Properties of metals Class activity Play

Properties of proteins Student activity Play

Proteins in our diet Animation Play

Proving the cosine rule Animation Play

Quartet and other multiplets: 'n + 1' rule Animation Play

Radiocarbon dating Whiteboard exercise Play

Radiocarbon dating Student activity Play

Reaction mechanisms Student activity Play

Reactions in the gaseous phase Whiteboard exercise Play

Reactions in the gaseous phase Student activity Play

Reflection symmetry in the coordinate system in the line y = –x Student activity Play

Relative molecular mass Student activity Play

Relative velocity vectors Student activity Play

Removal of inorganic salts from wastewater Animation Play

Replacing soil minerals Student activity Play

Repulsion between current-carrying conductors Animation Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Right hand rule Animation Play

Role of anions in plant cells Slideshow Play

Role of cations in plant cells Slideshow Play

Role of macro-elements absorbed as anions Student activity Play

Role of macro-elements absorbed as anions Whiteboard exercise Play

Role of macro-elements absorbed as cations Student activity Play

Rounding decimals to a whole number Animation Play