Mean velocity and the root-mean-square-root velocity of gas molecules Animation Play

Mean velocity and the root-mean-square-root velocity of gas molecules Whiteboard exercise Play

Measurement of mass change during the reaction Whiteboard exercise Play

Measurement of the volume of gas during decomposition of a substance Animation Play

Measuring mass changes in the reaction mixture Animation Play

Measuring the pressure of the gas evolved Animation Play

Measuring the volume of gas evolved Animation Play

Meiosis and the Mendelian law of segregation Slideshow Play

Melting and boiling points Simulation Play

Melting and boiling points (1) Student activity Play

Melting point Student activity Play

Melting points and boiling points Student activity Play

Mendel's first law Slideshow Play

Mendel's first law Student activity Play

Mendel's first law – the law of segregation Whiteboard exercise Play

Mendel's first law – the law of segregation Student activity Play

Mendel's second law – the law of independent assortment Student activity Play

Mendel's second law – the law of independent assortment Whiteboard exercise Play

Metals as catalysts Animation Play

Meteor Animation Play

Methane – another component of the carbon cycle Slideshow Play

Model of argon Illustration Play

Modes of gas exchange in organisms Slideshow Play

Molar mass and density of air Animation Play

Molar mass of the gas Whiteboard exercise Play