Reaction conditions and enthalpy change Slideshow Play

Reaction in the gas phase Slideshow Play

Reaction of ethene with bromine Animation Play

Reaction of the brain to environmental changes Slideshow Play

Reaction rate Whiteboard presentation Play

Reaction rate Class activity Play

Reaction series for the changes undergone by ethanol in the human organism Whiteboard exercise Play

Reaction yields Student activity Play

Reactions involving phase changes Animation Play

Real gases Animation Play

Real gases Whiteboard exercise Play

Real gases Student activity Play

Recent changes in the Earth's temperature Slideshow Play

Recognizing the pressure equation Whiteboard exercise Play

Recombination in bacteria Animation Play

Relationship between gas volume and pressure Animation Play

Relationship between Kp and Kc Student activity Play

Renewable energy resources Student activity Play

Responses of the autonomic nervous system to changes in the external environment Student activity Play

Responses to changes in ambient temperature Whiteboard exercise Play

Reversible reactions and chemical equilibrium Class activity Play

Reversible reactions and chemical equilibrium Whiteboard presentation Play

Rock transformations Student activity Play

Root pressure Animation Play

Seasonal changes Student activity Play