The food you eat is changed chemically and physically in the digestive system. When you eat a sandwich, which step in the digestion process is a physical change?
Saliva in your mouth mixes with food to make it more usable by cells.
Digestive juices from your liver break down fats contained in the food.
Liquid from your pancreas changes starch into sugar in your small intestines.
The walls of your stomach contract to turn the food from a solid to a thick liquid.
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The food you eat is changed chemically and physically in the digestive system. When you eat a sandwi...
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