Chemical and Physical Changes in Digestion

Which is an example of physical change in digestion?

• Saliva breaking down food

• Water absorbed in large intestines

• Acids in the stomach being broken down

Which of the following is an example of a chemical change in digestion?

• Enzymes in saliva breaking down food

• Teeth grinding down a burger

• Large intestine absorbing water

• Peristalsis pushing food in the esophagus

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following examples model physical change during digestion?

• Burning toast

• Freezing pickle juice to create a Popsicle

• Grinding food in a blender

• Cooking an egg with oil

Which of the examples is a physical change that takes place in our mouth in the digestion process.

• Saliva helps break down food into simple sugars

• grinding food breaks down food into smaller pieces

You eat a hamburger from McDonald's from lunch and 20 piece chicken nuggets. Which of the following steps causes a chemical change in the digestion of the food?

• Your esophagus transports the food from your mouth to your stomach

• Your teeth grind down the food into small pieces

• Your stomach acids break down large food molecules into smaller food molecules.

• Your large intestine absorbs water that the food had

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NGSS.MS-PS1-2

Would the action churning in the stomach be considered a physical or chemical change?

• Physical change

• Chemical change

Would peristalsis be considered a physical or chemical change?

• Physical change

• Chemical change

Is breaking bond of large molecules from food a physical or chemical change?

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Would enzymes in our saliva that help break down carbohydrates into simple sugars be considered a physical or chemical change?

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The esophagus goes through a process knows as peristalsis which transports food from the mouth to the stomach. Is peristalsis an example of physical or chemical change in digestion?

• Physical change

• Chemical change