In an experiment to investigate the effect of light intensity on the rate of photosynthesis, a student measures the volume of oxygen gas collected in a graduated cylinder.
They use a graduated cylinder that has a scale with 0.2 cm3 divisions. The student records a measurement of 8.4 cm3.
What is the uncertainty of this measurement?
±0.1 cm3\pm 0.1\text{ cm}^3±0.1 cm3
±0.2 cm3\pm 0.2\text{ cm}^3±0.2 cm3
±0.4 cm3\pm 0.4\text{ cm}^3±0.4 cm3
±0.5 cm3\pm 0.5\text{ cm}^3±0.5 cm3