Effect of acid rain on buildings
The materials required for the science fair project experiment:
- 100 grams of marble
- 100 grams of limestone
- 100 grams of brick
- 100 grams of granite
- 1 digital weighing scale
- 4 beakers
- 1600ml of vinegar
- 1 measuring cylinder
- 1 piece of cloth
- 1 sand paper
1. For this science fair project, the independent variable is the type of construction material tested – marble, limestone, brick and granite. The dependent variable is the weight of the remaining construction material after a few days. This is determined by measuring the weight using a digital weighing scale. The constants (control variables) are the acidity of the vinegar solution, the amount of vinegar used, the initial weight of the construction material and the length of time the science experiment is conducted.
2. On the first day of the science fair project, the construction materials selected to be tested are marble, limestone, brick and granite. All 4 materials are cleaned and their weight checked to be ensure that they each weight exactly 100g. If the weight is over 100grams, the specimen’s weight is reduced using sand paper (or hammer and chisel, if necessary). The starting weights of the samples are recorded in the table given below.
3. The measuring cylinder is used to measure 400ml of vinegar and poured into each of the 4 beakers. The construction materials to be tested are placed into each of the beakers. The vinegar solution is used to simulate acid rain.
4. Every day for the next 4 days the specimens are removed from the beaker, wiped lightly with a piece of cloth and their weight is checked on the digital weighing scale and recorded in the table given below.
Handle acids with care - ensure that you wear protective clothing/goggles/gloves. Adult supervision required.