The student knows that matter has physical and chemical properties and can undergo physical and chemical changes. The student is expected to distinguish between physical and chemical changes in matter.
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Q 1/4
Score 0
Many processes occur in the digestive system. Which process is best classified as a physical change?
60
Digestive enzymes breaking down proteins into smaller fragments
Teeth grinding an almond into smaller pieces in the mouth
Bacteria converting lactose into simple sugars in the intestines
Saliva converting the starch molecules in crackers into simple sugars
Q 2/4
Score 0
A student listed how different parts of the body work to aid in the digestion of food. Which of the following is a chemical change that occurs to the food?
60
The reduction in size of food particles as food is chewed
None of the above
The breakdown of molecules of food by enzymes and acid in the stomach
The movement of food to the stomach after food is swallowed
4 questions
Q.
Many processes occur in the digestive system. Which process is best classified as a physical change?
1
60 sec
7.6
Q.
A student listed how different parts of the body work to aid in the digestion of food. Which of the following is a chemical change that occurs to the food?
2
60 sec
7.6
Q.
Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules.
Which statement best describes changes to food during digestion?
3
60 sec
7.6
Q.
Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?
