Synopsis
Spec references J247: B5.1i, B5.1j J250: B5.1g, B5.1h. Summary of inheritance including: dominant and recessive alleles, genetic diagrams, inherited diseases with recessive and dominant alleles (examples given are Hungtingdon's and cystic fibrosis), genetic screening and the ethics, and XX and XY chromosomes. This video uses references like "mum" and "dad" throughout. Students should be encouraged to say parent(s) or male/female.
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.