1. Digestion physiology
- Identify questions that can be answered through scientific investigations (Standard A.1.1)
- A substance has characteristic properties all of which are independent of the amount of the sample (Standard B.1.1)
- Design and conduct scientific investigations (Standard A.1.2)
- The physical properties of compounds reflect the nature of the interactions among its molecules (Standard B.2.4)
Prior knowledge & experience:
Students can eat more than five pretzels, or even an entire bag, however not in a minute. The additives in the pretzels maintain their dryness. When trying to eat them in a minute, there is not saliva in the mouth to get through even five pretzels. It requires only a portion of one pretzel to absorb all the saliva in a student's mouth.
In eating competitions, competitor's drink water in between each bite to help them swallow down all the food in a timed period.
Predict how many pretzels you can eat in a minute.
Students will guess twenty or thirty, or even the entire bag.
The size of the pretzels mislead them which is why they think they can eat so many. They overestimate how many they can eat in a minute since they don't realize that there are additives in the pretzels that keep them dry.
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