Synopsis
David Attenborough is a passionate Darwinian, and sees evolution as the cornerstone of all the programmes and series he has ever made. Here, he shares his personal view on Darwin's controversial idea. Taking us on a journey through the last 200 years, he tracks the changes in our understanding of the natural world. Ever since Darwin, major scientific discoveries have helped to underpin and strengthen Darwin's revolutionary idea so that today, the pieces of the puzzle fit together so neatly that there can be little doubt that Darwin was right. As David says: 'Now we can trace the ancestry of all animals in the tree of life and demonstrate the truth of Darwin's basic proposition. All life is related.'
Chemical Calculations (J250) | GCSE Bitesize Revision
Spec references J250: C2.1. This video provides an overview of how the masses of subatomic particles are used to calculate atomic masses. It then explains Relative Atomic Mass using chlorine isotopes as an example, followed by an introduction to formula masses, mole calculations, and percentage mass. The video concludes with discussions on the conservation of mass and atom economy. Given its fast pace, the content is likely better suited for revision rather than introducing these concepts.
Reversible Reactions - the Haber process | GCSE Bitesize Revision
This video provides an overview of ammonia production through the Haber process, briefly touching on the necessary conditions but without fully detailing them.