Question

1. which of these indicates a physical change that occurs during the process of digestion? the squeezing of food through the intestines the breakdown of food substances by digestive juices the secretion of pepsin to change proteins to peptones the addition of acids to create a ball of food

Explanation:

Physical changes in digestion involve altering the form of food without changing its chemical composition. Squeezing food through the intestines is a physical - movement process. Breaking down food substances by digestive juices and secreting pepsin to change proteins to polypeptides are chemical changes. Adding acids to create a ball of food is also a chemical - interaction process.

Answer:

the squeezing of food through the intestines