Which rain gauge would be least accurate for measuring heavy rainfall? View Available Hint(s) \( \begin{array}{l}\text { any open container } \\ \text { weighing gauge } \\ \text { tipping-bucket gauge } \\ \text { standard rain gauge }\end{array} \)

To determine which rain gauge would be least accurate for measuring heavy rainfall, let's analyze the options provided: 1. **Any open container**: This type of gauge can collect rainwater but may overflow during heavy rainfall, leading to inaccurate measurements. 2. **Weighing gauge**: This gauge measures the weight of the collected rainwater. It can handle heavy rainfall effectively, as it continuously measures the weight without the risk of overflow. 3. **Tipping-bucket gauge**: This gauge measures rainfall by tipping a bucket when a certain amount of water is collected. It can also handle heavy rainfall, but if the rain is too heavy, it may not tip accurately, leading to potential underestimation. 4. **Standard rain gauge**: This is a cylindrical container that collects rainwater. It can measure rainfall accurately but may overflow during very heavy rainfall. Considering these points, the **open container** would be the least accurate for measuring heavy rainfall, as it is prone to overflow and cannot provide a reliable measurement under such conditions. Thus, the answer is: **any open container**.