Directional changes in an ecosystem Animation Play

Discontinuous variation Student activity Play

Discontinuous variation Slideshow Play

Diseases related to chromosome changes Illustration Play

Dispersion forces in halogens Animation Play

Dissipation of heat Animation Play

Dissolution of gases in water Student activity Play

Dissolution of gases in water Whiteboard exercise Play

Distinguish between a physical and a chemical changes Whiteboard exercise Play

Diurnal changes in the body temperature of the camel Animation Play

Doubling time changes Student activity Play

Doubling time changes Whiteboard exercise Play

Early research on mutations Slideshow Play

Ecological tolerance Student activity Play

Effect of concentration on chemical equilibrium Student activity Play

Effect of number of gas particles on the pressure Animation Play

Effect of temperature and catalyst on the reaction rate Whiteboard presentation Play

Effect of temperature and catalyst on the reaction rate Class activity Play

Effect of temperature increase on reaction rate at the molecular level Animation Play

Effect of temperature on an exothermic reaction Animation Play

Effect of temperature on chemical equilibrium Whiteboard exercise Play

Effect of temperature on chemical equilibrium Student activity Play

Effect of temperature on chemical equilibrium Student activity Play

Effect of temperature on chemical equilibrium Whiteboard exercise Play

Effect of temperature on free energy change Student activity Play