1. In a pressure cooker, the increased pressure (15 pounds per inch or 15 pounds above normal sea level pressure) due to a closed area increases the boiling point of the water from 212 F to 250 F. It is this increased temperature that cooks the food faster. Once the pressure is reached inside the cooker, a valve releases the extra pressure.
2. the physical changes taking place upon eating the food include the actions of chewing, tearing, grinding, mashing, mixing and crushing it in our mouth, by the actions of teeth and tongue.
3. The food upon eating or digestion breaks down from complex molecules to simpler molecules through the process of catabolism. an example is breakdown of carbohydrates into sugars by saliva, excreted from salivary glands.
Q: What is one example of a physical change that food goes through as you eat it? What is one example of a chemical change that food goes through as you eat or digest it?
One example of physical change in food is when you're eating it. Physical changes mean a change that doesn't affect the object by changing it into a different substance. So eating it in your mouth counts as a physical change
One example of chemical change is when you actually digest it. Digesting food is a chemical reaction since you mix the food and acid in your body.