Provision and emission of heat Whiteboard exercise Play

Pythagorean theorem in 3-dimensional space Student activity Play

Pythagorean theorem in 3-dimensional space Whiteboard exercise Play

Questions about the physical changes Whiteboard exercise Play

Radiation of heat Student activity Play

Radiation of solids Student activity Play

Reaction of potassium bromide and potassium iodide with sulphuric acid Animation Play

Reactions between metal halides and concentrated sulphuric acid Student activity Play

Reactions between metal halides and sulphuric acid Animation Play

Reactions occurring on the surface of a solid catalyst Whiteboard exercise Play

Reactions occurring on the surface of a solid catalyst Student activity Play

Refraction of light Student activity Play

Regular polyhedron Animation Play

Relationship between volumes of similar solids Student activity Play

Relationship between volumes of similar solids Whiteboard exercise Play

Removing hardness from water Student activity Play

Removing hardness from water Whiteboard exercise Play

Removing permanent hardness of water Animation Play

Removing temporary hardness of water Animation Play

Riddles about 3-D shapes Whiteboard exercise Play

Riddles about 3-D shapes Student activity Play

Right prisms Whiteboard exercise Play

Rocks and minerals Student activity Play

Sample compounds Slideshow Play

Sections of a cube Whiteboard exercise Play