Packing tissue Student activity Play

Partial pressure and molar fraction Student activity Play

Particle theory and changes in state Student activity Play

Particle theory and changes of state Animation Play

Passage of water through a plant Animation Play

Passage of water through a plant Animation Play

Peptide hormones Animation Play

Period 3 elements Slideshow Play

Periodic trends in the chemical properties of elements Whiteboard presentation Play

Periodic trends in the chemical properties of elements Class activity Play

Permanent dipoles Whiteboard exercise Play

Permanent dipoles Whiteboard exercise Play

Permanent dipoles Student activity Play

Permanent dipole–dipole moment Animation Play

Permanent dipole–permanent dipole forces Student activity Play

Permanent dipole–permanent dipole interaction in liquids and gases Animation Play

Permeability and absorption of X-rays Student activity Play

Petroleum Student activity Play

Petroleum composition Slideshow Play

pH and the ionic product of water Student activity Play

pH and the ionic product of water Whiteboard exercise Play

pH of ammonia solution Animation Play

pH of ammonium chloride solution Animation Play

pH of natural water Animation Play

pH of strong bases Student activity Play