Eli’s Rainwater Experiment
A story about measuring, graphing and learning from data.
Eli loved the rain, but he could never agree with his brother about how much had fallen. “It poured all night!” Eli would say. “It only drizzled,” his brother would reply. They argued about it every wet morning.
One day, their teacher, Ms Cho, set a challenge. “How could we measure the rain properly?” she asked. Eli thought of a ruler and a jar. He built a rain gauge from a plastic bottle, cut flat at the top, with a ruler taped to the side.
He placed it in the open, away from the trees, and wrote down the reading every morning at eight o’clock. He used a notebook, with a table of dates and millimetres. For the first week, the reading was zero every day. The sky stayed stubbornly blue.
Then, on a Friday, a storm rolled in. By Saturday morning, the bottle held eighteen millimetres. Eli grinned. “That is real rain,” he said. His brother peered at the bottle. “It looks like a lot,” he admitted. The argument ended there.
But Eli had caught the measuring bug. He started a second gauge at his friend Bo’s house, three streets away. After the next rain, he compared the numbers. His gauge read twelve. Bo’s read fifteen. “Why are they different?” he wondered.
He asked Ms Cho. “Rain can be patchy,” she said. “A cloud may drop more on one street than another.” Eli found that quite amazing. He added a third gauge at his grandmother’s house on the other side of town. It read seven.
By the end of term, he had a month of data from three places. He drew a bar graph on graph paper, with a bar for each week. Peaks showed the stormiest days, and flat bars showed dry spells. He pinned the graph on the classroom wall.
His classmates gathered around. “This is brilliant,” said one. “Can we make one for the school garden?” Eli nodded. He showed them how to build their own rain gauges from bottles. By spring, the school had twelve.
Eli’s brother helped read them every morning. They no longer argued about rain. They simply checked the number and wrote it down, and Eli felt very satisfied.
✨ Key Takeaways
- Measuring gives us facts, and arguments can be settled with data.
- Rain can be different in different places, even close by.
- A simple tool made from recycled things can do real science.
💬 Questions for Discussion & Reflection
- How did Eli build his rain gauge?
- What surprising thing did he discover about rain?
- What weather could you measure at home?
Print a science observation log →