They are nothing to do with science. The curriculum also deals with scientific evidence and the dissemination of information. Here we have the confusion between science and technology, science and ethics, science and social policy, and the 'uncertainty' which is usually wheeled out by eco-worriers to halt new development. And instead of trying to resolve this confusion, the UK government wants to teach it to school pupils. The difference between science and ethics is the difference between knowledge and applications of knowledge.
Science is knowledge of nature and of the effects of human intervention in nature.
Applications of knowledge, on the other hand, depend on the society that possesses that knowledge. Natural science is unable to answer questions of an ethical nature. With some amplification from the media and interest groups, anxious parents see a brave researcher holding out against the establishment. However the research establishment simply see unsubstantiated claims, and a lack of scientific rigour. No statistical scientist would ever claim with certainty to have ruled out a causative factor.