In a science experiment, you are asked to dissolve 1 teaspoon of different substances into 50 mL of water. List the factors or variables that could lead to an inaccurate result. Is this a fair test?

For an experiment involving mixing substances with water, several variables need to be controlled to ensure accuracy. If these are not consistent, the results may be inaccurate.

• 5. List the factors or variables that could lead to an inaccurate result.
  • Inconsistent measurement of water volume (not exactly 50 mL for each trial).
  • Inconsistent measurement of the substance (the "level teaspoon" might vary slightly).
  • Differences in water temperature, which can affect solubility.
  • Variations in the stirring or mixing method for each substance.
  • Contamination of the measuring cylinders or substances.

A fair test is one where only one variable is changed (the independent variable), and all other variables (controlled variables) are kept the same.

• 6. Is this a fair test? Yes, this is designed to be a fair test because the instructions specify controlling two key variables:
  • The volume of water (50 mL) is kept constant.
  • The amount of each substance (one level teaspoon) is kept constant. This allows for a direct comparison of how different substances interact with water under similar conditions.