All blood vessels are specifically structured to perform their function. For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope ...

A zinc oxide nanoparticle has a diameter of 32 nm. The diameter of a zinc atom is 0.28 nm. Estimate how many times larger the nanoparticle is compared to a zinc atom. A cube-shaped nanoparticle ...

Here you will find our growing collection of free PowerPoint-based packs of interactive revision games and quizzes to test recall of key parts of the Edexcel GCSE History specification.