The structures of the egg cell Whiteboard exercise Play

The Sun – a thermonuclear reactor Student activity Play

The Sun – a thermonuclear reactor Animation Play

The total energy of an electron in an orbit Animation Play

Tissues and organs Simulation Play

Tissues and organs Student activity Play

Transcription Slideshow Play

Transcription Whiteboard exercise Play

Transcription Student activity Play

Transformation of an atom into an ion Whiteboard exercise Play

Transformation of an atom into an ion Student activity Play

Transport in the xylem and phloem Slideshow Play

Transport inside and outside the nucleus Whiteboard exercise Play

Types of forces Student activity Play

Uranium Student activity Play

Uranium Simulation Play

Variation of electronegativity across a period (1) Student activity Play

Variation of electronegativity within a group Student activity Play

Vascular tissue Student activity Play

Why does the electronegativity change across a period? Animation Play

α decay Whiteboard exercise Play

α decay Student activity Play

α decay Animation Play

β decay Animation Play

β decay Whiteboard exercise Play