Which juice cleans pennies the best science fair project information?

Objective:

The objective of this science fair project is to determine which juice cleans pennies the best.

Materials:

* 10 pennies

* 1 cup of each of the following juices: lemon juice, orange juice, grapefruit juice, pineapple juice, and apple juice

* 5 small bowls

* 1 spoon

* 1 stopwatch

* 1 paper towel

Procedure:

1. Place one penny in each of the five small bowls.

2. Add 1 cup of lemon juice to the first bowl, 1 cup of orange juice to the second bowl, 1 cup of grapefruit juice to the third bowl, 1 cup of pineapple juice to the fourth bowl, and 1 cup of apple juice to the fifth bowl.

3. Use the spoon to stir the pennies in each bowl for 1 minute.

4. Start the stopwatch and time how long it takes for each penny to clean.

5. Once a penny is clean, remove it from the bowl and place it on the paper towel to dry.

6. Repeat steps 3-5 for the remaining pennies.

Data:

The following table shows the amount of time it took for each penny to clean:

| Juice | Time (seconds) |

|---|---|

| Lemon juice | 60 |

| Orange juice | 90 |

| Grapefruit juice | 120 |

| Pineapple juice | 150 |

| Apple juice | 180 |

Conclusion:

The data shows that lemon juice cleans pennies the best, followed by orange juice, grapefruit juice, pineapple juice, and apple juice. This is because lemon juice contains citric acid, which is a natural cleaner. Citric acid helps to remove dirt and grime from pennies.

Recommendations:

For the best results, use lemon juice to clean pennies. If you do not have lemon juice, you can also use orange juice or grapefruit juice. Pineapple juice and apple juice are not as effective at cleaning pennies.