Answer:
1. As the bread/cracker breaks down while being chewed, it is initially digested and broken down to almost liquid state ready for ingestion.
2. Saliva has no direct relevance with the changes in the state of food. taste depends on the taste buds on your tongue.
3. The tongue provides control for ingestion.
4. Digestion in the mounth is a kind of physical change.
5. As the food goes into the esophagus, food slowly goes down.
