What happens if a police officer catches someone with a substance that looks like a drug? Drugs are not always illegal, as some drugs are medicinal. Sometimes, suspects claim a substance is sugar, not an illegal drug, therefore the police officer would need to identify the substance.
Year 8 used chemical tests in a practical to identify unknown substances in the form of white powders. It was a great, interactive lesson where the pupils got the chance to put what they have been learning about to the test.