Reactions involving phase changes Animation Play

Recent changes in the Earth's temperature Slideshow Play

Recombination in bacteria Animation 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 and irreversible processes Animation Play

Reversible and irreversible processes Student activity Play

Seasonal changes Student activity Play

Seasonal changes Whiteboard exercise Play

Solubility Animation Play

Speed changes Animation Play

Spontaneity of the process Whiteboard exercise Play

Spontaneous changes Animation Play

Spontaneous changes and probability Whiteboard exercise Play

Spontaneous changes and probability Student activity Play

Standard entropy change Chart Play

Standard entropy change Student activity Play

Standard entropy values Animation Play

Succession and changes in ecosystems Student activity Play

Succession and changes in ecosystems Whiteboard exercise Play

The Carnot engine Animation Play

The Carnot engine Animation Play

The Carnot engine Student activity Play

The concept of the entropy of a system Student activity Play

The concept of the entropy of a system Whiteboard exercise Play