Chemistry, 13.01.2020 08:31 ashiteru123

Are the following physical or chemical changes?

1. the teeth tear off a bite of pizza:

2. the starch in the pizza crust turns to sugar:

3. muscles squeeze the chewed pizza down your esophagus:

4. in the intestines, liquids from the kidneys and pancreas mix with leftovers from the stomach:

5. water is recycled back into your body:

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Are the following physical or chemical changes?

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