Hypothesis and Observations

Sarah's class is preparing for an upcoming class science fair. They have been researching various science experiments. Sarah chose to clean pennies in assorted kitchen liquids. She had to find five equally dirty pennies, and selected 7-up, lemon juice, apple cider vinegar, hot sauce, and cranberry juice. Her hypothesis states that she believes the 7-up will do the best job of cleaning the pennies.

Tonight she labeled everything and placed the liquids and pennies in the containers. Each day for 7 days, she needs to record her observations. We agreed to keep them in a box in the extra bathroom so they will be out of the way. We don't want to ruin her experiment, and we don't want to smell it in the middle of the house.

We have been curious about the experiments going on in the other 3rd/4th graders' homes. We know of a test for which brand of bubble gum holds the flavor the longest, which method ripens green bananas more quickly, which soil will improve cucumber plant growth, and a fascinating volcano experiment.