Question 1 of 10
What causes tooth decay?
A: Acid
RIGHT
Explanation: Tooth decay occurs when foods containing carbohydrates (sugars and starches) are left on the teeth. Bacteria that live in the mouth digest these foods, turning them into acids. Bacteria, acids, food debris, and saliva all combine to form plaque that sticks to tooth enamel. The acids in turn dissolve the surface of the enamel of the teeth, creating holes called cavities.
B: Age
ERROR
Correct Answer: Tooth decay occurs when foods containing carbohydrates (sugars and starches) remain on the teeth. Bacteria that live in the mouth digest these foods, turning them into acids. Bacteria, acids, food debris, and saliva all combine to form plaque that sticks to tooth enamel. The acids in turn dissolve the surface of the enamel of the teeth, creating holes called cavities.
C: caries
ERROR
Correct Answer: Tooth decay occurs when foods containing carbohydrates (sugars and starches) remain on the teeth. Bacteria that live in the mouth digest these foods, turning them into acids. Bacteria, acids, food debris, and saliva all combine to form plaque that sticks to tooth enamel. The acids in turn dissolve the surface of the enamel of the teeth, creating holes called cavities.
D: Caffeine
ERROR
Correct Answer: Tooth decay occurs when foods containing carbohydrates (sugars and starches) remain on the teeth. Bacteria that live in the mouth digest these foods, turning them into acids. Bacteria, acids, food debris, and saliva all combine to form plaque that sticks to tooth enamel. The acids in turn dissolve the surface of the enamel of the teeth, creating holes called cavities.