Water is one of the most important things on Earth. Did you know that the water you drink today is the same water that dinosaurs drank millions of years ago? This is possible because of the water cycle. The water cycle is the process where water moves from the ground to the sky and back again. It never stops, and it keeps our planet healthy.
The cycle starts with the sun. The sun warms the water in oceans, lakes, and rivers. When the water gets hot, it turns into an invisible gas called water vapor. This part is called evaporation. The vapor rises high into the air. As it gets higher, the air becomes cooler. The cool air turns the vapor back into tiny water droplets. These droplets group together to form clouds. Scientists call this step condensation.
When the clouds become heavy with water, the water falls back to the ground. Depending on the temperature, it can fall as rain, snow, or ice. This is called precipitation. The water then flows into rivers and eventually goes back to the sea. Some water also sinks into the ground for plants to use.
Understanding the water cycle helps us learn how to protect our environment. It shows us that water is a limited resource. If we pollute our rivers, that pollution can stay in the cycle for a long time. By studying science, we can find better ways to save water and keep our world clean for the future.
The Magic of the Water Cycle
中文翻譯
水是地球上最重要的事物之一。你知道嗎？你今天喝的水與數百萬年前恐龍喝的水是一樣的。這之所以可能，是因為有水循環。水循環是水從地面移動到天空再回到地面的過程。它從不停止，並保持我們星球的健康。循環從太陽開始。太陽加熱海洋、湖泊和河流中的水。當水變熱時，它會變成一種稱為水蒸氣的無形氣體。這部分被稱為蒸發。水蒸氣上升到高空。隨著高度增加，空氣變得更冷。冷空氣將水蒸氣變回微小的水滴。這些水滴聚集在一起形成雲。科學家稱這一步驟為凝結。
當雲中的水分變重時，水就會落回地面。根據溫度的不同，它可能以雨、雪或冰的形式落下。這被稱為降水。接著，水流進河流，最終回到大海。有些水也會滲入地下供植物使用。
了解水循環有助於我們學習如何保護我們的環境。它向我們展示了水是一種有限的資源。如果我們污染河流，那種污染可能會在循環中停留很長時間。透過學習科學，我們可以找到更好的方法來節約用水，並為未來保持世界的清潔。
🔑 重點單字 (Vocabulary)
- process n.. 過程；進程
- invisible adj.. 看不見的；無形的
- evaporation n.. 蒸發
- condensation n.. 凝結
- precipitation n.. 降水（雨、雪等）
- temperature n.. 溫度
- resource n.. 資源
- environment n.. 環境
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