mechanical digestion
By definition mechanical digestion is a physical part of digestion.
what involves both chemical and physical change on earths surface
intestine
intestine
The esophagus has a physical break down. The esophagus squeezes the food down into the stomach, making this a physical break down.
Mechanical digestion stands for the break down of food by chewing. Mechanical digestion is the physical part of the digestion process of the human body.
Digestion is the PROCESS of breaking food down so that it can be used by a body. In humans, PART of that process involves an acid in your stomach.
energy is part of a physical change
the chewing in the mouth is part of digesting of food particularly carbohydrates. It is the only part of physical change because the food is only broken down to digestable particles. The rest of digestion (including the small intestines and stomach) are the parts encountering chemical change due to many enzymes and acids participating. The End.
Chemical digestion takes place in the stomach, the intestines, (saliva or enzymes) these parts of your body also use mechanical digestion.
Sawdust is part of a physical change that takes place when wood is sawed.
physical change because part changes to a liquid or solid, while another part changes to a gas - however the substance is only changing state, so it would be a physical change