Living Environment Regents Practice Test

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What tool would be appropriate for measuring water in an experiment on photosynthesis in corn plants?

A thermometer
A graduated cylinder
A beaker
A scale

The correct answer is: A graduated cylinder

A graduated cylinder is the most appropriate tool for measuring water in an experiment on photosynthesis in corn plants because it provides precise volume measurements. In scientific experiments, accurate and reproducible measurements are crucial. The graduated cylinder features marked measurements along its side, allowing for easy reading of liquid volumes to ensure that the exact amount of water is used in the experiment, which is vital for consistency in trials. In contrast, while a beaker can hold liquids like water, it typically offers less precision than a graduated cylinder due to its wider opening and less detailed measurement markings. A thermometer is designed specifically for measuring temperature, which is not relevant for measuring water volume in this context. A scale measures mass or weight, which does not directly relate to the volume of water for the experiment. Thus, the graduated cylinder stands out as the best choice for the task at hand.