States of Matter: STEM and Careers Solids liquids and gases are so important in lots of industries. Bricks that melt in the sun would be pretty useless. An air freshener must release gas particles if the smell is to fill the room. A jelly that doesn't set to become solid just isn't jelly. Many scientists test products, including foods to make sure they are fit for purpose. These scientists can be researching new products, improving existing products, or making sure that products are exactly as they should be. STEM Challenge You are going to work as a quality assurance scientist. Your task is to investigate a customer’s complaint that bottle of cola they bought was fizzier than normal. You need to identify if there was a problem in the manufacturing process that meant too much gas was added to the Cola. You need to measure the amount of gas in the cola. Careers The food industry is a large employer in Northern Ireland. Research careers as a food technician, food scientist, and a quality technician