Science. Explain why iron sulphide is a compound and not just a mixture of the two elements iron and sulphur. Explain why iron sulphide has different properties to a mixture of iron and sulphur and also describe and explain tests that can distinguish between iron sulphide and a mixture of iron and sulphur.
General information. Dietitians are the only qualified health professionals that assess, diagnose and treat dietary and nutritional problems at an individual and wider public-health level. They work with both healthy and sick people.
It can be hard to understand the difference between a nutritionist and a registered dietitian. An expert adviser when it comes to food and nutrition, a registered dietitian (RD) is a nationally recognized profession certified by the Academy of Nutrition and Dietetics (AND). nutritionist is not nationally recognized, but individual states sometimes require nutritionists to be licensed. However, in order to communicate a broader concept of wellness, the AND has introduced the registered dietitian nutritionist (RDN) designation.