Question: Paula wants to test a food to see if it contains acid and/or sugar. When Paula added water and yeast to a sample of the food and put the mixture in a warm water bath, the mixture began to fizz and bubble. Paula tested for the other substance. What would the test results tell her?
Reference answer: If gas (carbon dioxide) is produced, the food contains acid. If no gas is produced, the food does not contain acid.

Student answer: Not much sugar is in the thing she is testing.

Student answer: The results tell her that acid is present.

Student answer: If it has a lot of sugar a little bit of sugar or no sugar at all.

Student answer: If the tube shoots up then the substance has acid in it.

Student answer: The test results will tell her that the one with sugar has acid. Because it bubbles up.

Student answer: That it either has sugar or it does not have sugar.

Student answer: The test results tell her how much gas is in the food.

Student answer: If the vinegar made the baking soda react it would shoot carbon dioxide into the pusher, then she needs to write down how many milliliters of carbon dioxide there is.

Student answer: Her test results would tell her what had more sugar in it.

Student answer: If the syringe went up at all, that means the food contains acid. We already know that the food contains sugar because it fizzed.

Student answer: The more carbon dioxide the more carbon dioxide it has in it.

Student answer: If it had acid and how much sugar.

Student answer: Vitamin C or acid.

Student answer: How much acid and or sugar there is.

Student answer: If the syringe goes way up it has a lot of acid, if not has a little or none.

Student answer: The results would tell her how much acid was in the substance.

Student answer: It will tell her if there is a lot or not a lot of sugar in the food.

Student answer: The amount of acid in the food.

Student answer: If the food contains acid and how much.

Student answer: That whatever she test has more acid or sugar.

Student answer: I was not here when we did it.

Student answer: The results will tell her the amount of acid and sugar.

Student answer: The end or final will go white after it.

Student answer: How much sugar and acid there is.

Student answer: That there was sugar in the cookie.

Student answer: The results will tell her how much sugar the pizza has or acid.

Student answer: The results would tell her how much sugar, carbon dioxide, there is in the bag.

Student answer: The results will tell her how much vitamin C it in her test.

Student answer: It would show her how to check for acid.

Student answer: Her results will tell her how much acid is in the juice. The more carbon dioxide or gas the more acid it has.

Student answer: The syringe will go up and will tell you how many milliliters.

Student answer: It would tell her that how much acid is in lemon, lime, or tangerine.

Student answer: If the syringe goes up that means there is acid in the food.

Student answer: The test results would tell her that the food substance that fizzed and bubbled the most has the most sugar.

Student answer: It would tell her that the one which bubbled up most must have acid or sugar.

Student answer: That is how much acid or sugar it has.