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The teeth grinding is a mechanical change. The saliva mixing in with the food and starting the digestive process would be a chemical change.
The teeth chew food into smaller pieces.
mechanical processing
your teeth chew the food into smaller pieces and then you can swallow =)
Chemical digestion uses enzymes and other chemicals to break the bonds in food. Mechanical digestion is basically the teeth grinding the food into physically smaller pieces.
In the mouth, as your teeth are grinding and mashing your food into smaller, more manageable pieces, amalayse is mixed in with your saliva and is used to break down starches into sugars
Your molars are responsible for grinding food.
Incisor teeth are designed for the job of tearing off pieces of food. (As opposed to grinding down food once it's been torn off and is in your mouth).
breaking up and grinding food particles into small pieces using the teeth
Your teeth break down your food while u chew, into smaller pieces that are easier to swollow.
breaking up and grinding food particles into small pieces using the teeth
Dolphins have between 45 and 63 small, sharp teeth, which enable them to tear food into smaller pieces.