I learned this today. Yogurt is neither a simple liquid nor a solid, it is a non-Newtonian fluid-gel. A gel is a colloid, and a colloid is a substance that has microscopically dispersed insoluble particles suspended throughout another substance. A non-Newtonian fluid is a fluid that doesn’t follow Newton’s law of viscosity. This means viscosity […]
#47 What exactly is yogurt? Read More »
I learned this today. Canning preserves food by killing all of the bacteria present through heat and then keeping the food in a bacteria-free, airtight can. For food to rot, bacteria need water, oxygen, a neutral pH level, and a warm temperature. The different ways of preserving food each deal with one of these. Freezing
#15 How is food canned? Read More »
I learned this today. Salt preserves food by removing the water and vinegar preserves food by increasing its acidity. The refrigerator was invented in 1834. Before that, people used ice to keep food chilled. In the 1800s, Americans used over 5 million tons of ice annually. The ice was cut from northern countries (Scandinavian countries)
#7 How do salting and pickling preserve food? Read More »
I learned this today. Ketchup was created in the 17th century, but it wasn’t made of tomatoes. Ketchup began in Asia. The word ketchup either comes from the Hokkien Chinese word “ke-tsiap”, which was a salty sauce made from fermented fish, or the Malay word “kicap”, which was soy sauce. Whatever the origin of the
#2 Where did ketchup come from? What did it have to do with mushrooms? Read More »
I learned this today. We say, “the best thing since sliced bread”, but sliced bread has only been around since 1928. Humans have been eating bread for thousands of years. 30,000-year-old starch residue has been found on rocks used for pounding plants. Early humans could have spread the starch on a flat rock and cooked
#1 Who invented sliced bread? Read More »
