Air di atas dulang rata kurang bergerak ke satu arah. Apabila satu hujung dulang ditinggikan, permukaan menjadi condong.
Langkah 1
Air bergerak apabila permukaan condong
Air di atas dulang rata kurang bergerak ke satu arah. Apabila satu hujung dulang ditinggikan, permukaan menjadi condong.
dulang rata → tinggikan satu hujung → condong
Permukaan condong = 倾斜的表面 水放在平平的托盘上，不太会往某一边流。把托盘的一端垫高，表面就变得倾斜。这时水开始往一边移动。例子：桌子一边脚下垫一本书，洒在桌上的水就慢慢流向另一边。注意：托盘要先放平，才能和垫高后作比较。
Permukaan condong = sloping surface Water on a flat tray does not move much in one direction. When one end of the tray is raised, the surface becomes a slope, and the water starts moving. Example: Put a book under one leg of a table, and spilled water slowly runs toward the other side. Watch out: Start with the tray lying flat, so you can compare it with the raised tray.
Langkah 2
Air mengalir dari tinggi ke rendah
Pada permukaan condong, air mengalir dari tempat tinggi ke tempat yang lebih rendah. Arah aliran dapat ditandakan dengan anak panah.
Tinggi ke rendah = 从高到低 在倾斜的表面上，水会从高的地方流向比较低的地方。我们可以画箭头表示水流的方向。箭头从高处指向低处。例子：浴室地板做得有点斜，洗澡水会流向排水孔。注意：画箭头时不要画反，箭头尖要指向低的一边。
Tinggi ke rendah = high to low On a slope, water flows from the higher part to the lower part. We show the direction of flow with an arrow pointing from the high side to the low side. Example: A bathroom floor is built slightly sloped, so shower water runs into the drain. Watch out: Do not draw the arrow backwards; its tip must point to the lower side.
Langkah 3
Ujian adil memerlukan pemerhatian terancang
Gunakan isipadu air dan dulang yang sama, kemudian ubah ketinggian satu hujung sahaja. Lakarkan arah aliran yang diperhatikan.
kekal sama: air dan dulang | ubah: ketinggian
Ujian adil = 公平测试 用同样多的水、同一个托盘，只改变一端垫高的高度。然后观察水流，画出方向。这样才能知道高度改变带来什么影响。例子：每次都倒100 mℓ的水，先垫一块积木，再垫两块。注意：每次换不同的水量，结果就不能比较。
Ujian adil = fair test Use the same amount of water and the same tray, and change only the height of one end. Then observe the flow and sketch its direction. That shows what the height change does. Example: Pour 100 mℓ of water each time, first with one block under the tray, then with two blocks. Watch out: Changing the amount of water each time makes the results impossible to compare.
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Air mengalir ke bahagian yang...
Air mengalir ke bahagian = 水流向哪一边 题目问水会流向哪一部分。回想第2步：在斜面上，地心引力把水拉向哪里。也想一想，水能不能自己往上爬，或一直停在一样高的地方。例子：在滑梯顶端倒一点水，水会顺着滑梯流到地面。注意：要看清方向是往上还是往下，别看反。
Air mengalir ke bahagian = water flows to the part The question asks which part water flows to. Recall from Step 2 where gravity pulls water on a slope. Think about whether water can climb up by itself or always stay level. Example: Pour a little water at the top of a playground slide, and it runs down to the ground. Watch out: Read the direction carefully; do not mix up uphill and downhill.
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Apakah dibuat untuk menghasilkan cerun?
Menghasilkan cerun = 做出斜坡 题目问怎样做才能让托盘变成斜坡。“cerun”就是斜坡，一边高、一边低。回想第1步托盘是怎样从平变斜的。把托盘泡进水或盖起来，形状会不会变斜？例子：用木板搭在楼梯上，就变成让玩具车滑下的斜坡。注意：斜坡需要两端高度不同。
Menghasilkan cerun = making a slope The question asks what to do to turn the tray into a slope. 'Cerun' means a slope, high on one side and low on the other. Recall how the tray changed from flat to sloping in Step 1. Would dipping it in water or covering it make it tilt? Example: A plank resting on a stair becomes a ramp for toy cars. Watch out: A slope needs the two ends at different heights.
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Ingat: air bergerak apabila permukaan condong; air mengalir dari tinggi ke rendah; ujian adil memerlukan pemerhatian terancang.
