Heart rate – regulation by the nervous and endocrine systems Whiteboard exercise Play

Heart sounds and pulse Student activity Play

Heart sounds and pulse rate Slideshow Play

Heart; vessels and blood pressure Student activity Play

Heart; vessels and blood pressure Simulation Play

Hess's law Student activity Play

Hess's law Whiteboard exercise Play

Heterogeneous catalysis Whiteboard exercise Play

Heterogeneous catalysis Student activity Play

Heterogeneous catalyst Animation Play

Homolytic fission Animation Play

Homolytic fission of the C–C bond Student activity Play

How a catalyst works (1) Student activity Play

How a catalyst works (2) Student activity Play

How a catalyst works (2) Whiteboard exercise Play

How a tulip flower reacts to changes in the weather conditions Simulation Play

How can we significantly increase the reaction rate? Simulation Play

How can we significantly increase the reaction rate? Simulation Play

How can we significantly increase the reaction rate? Student activity Play

How catalysts work Whiteboard exercise Play

How catalysts work? Student activity Play

How do enzymes act? Student activity Play

How do temperature changes affect an equilibrium? Animation Play

How does a metal atom combine with a halogen atom? Animation Play

How metals react with water Student activity Play