Sifat bahan → kaedah pengasingan = 物质特性决定分离方法 要分开混合物，先看物质的特性：大小、会不会被磁铁吸、会不会浮、是固体还是液体。特性不同，就用不同方法。例子：混在一起的木屑和沙，放进水里，木屑浮起来就能捞走。注意：先看特性再选方法，不要随便选。
Sifat bahan = properties of materials To separate a mixture, first look at each material's properties: size, whether a magnet pulls it, whether it floats, and whether it is solid or liquid. Different properties lead to different methods. Example: Wood shavings mixed with sand can be put in water; the shavings float and can be scooped off. Watch out: Choose the method only after checking the properties, not by guessing.
Langkah 2
Larut dan tidak larut berdasarkan pemerhatian
Bahan larut tersebar dalam air selepas diaduk, manakala bahan tidak larut masih kelihatan. Gunakan ujian yang adil.
selepas aduk: hilang berasingan / masih kelihatan
Larut dan tidak larut = 溶解与不溶解 搅拌后，溶解的物质散开在水里，看不到颗粒；不溶解的物质还看得见。判断要靠观察。比较时要做公平测试，水量和搅拌都一样。例子：把可可粉和沙各放进一杯水，沙沉底仍看得见。注意：要等搅拌停下再观察，不要边搅边下结论。
Larut dan tidak larut = dissolve and not dissolve After stirring, a soluble material spreads through the water and its grains disappear, while an insoluble one can still be seen. We decide by observing. Use a fair test with the same water and stirring. Example: In two cups of water, cocoa powder spreads out but sand stays visible at the bottom. Watch out: Observe after the stirring stops, not while the water is still swirling.
Langkah 3
Tiga cara mempercepatkan pelarutan
Air panas, pengadukan dan saiz bahan yang kecil boleh mempercepatkan bahan larut. Ubah satu faktor pada satu masa.
panas + aduk + kecil → lebih cepat larut
Tiga cara mempercepatkan pelarutan = 三种加快溶解的方法 热水、搅拌、把物质弄小，都能让溶解变快。做实验时一次只改变一个因素。这样才知道是哪一个原因让它变快。例子：只比较冷水和热水时，两杯都不搅拌，糖的分量也一样。注意：同时用热水又搅拌，就分不出是哪一个起作用。
Tiga cara mempercepatkan pelarutan = three ways to speed up dissolving Hot water, stirring and using smaller pieces all make dissolving faster. In an experiment, change only one factor at a time, so you know which one caused the change. Example: When comparing cold and hot water, leave both unstirred and use the same amount of sugar. Watch out: Using hot water and stirring together hides which factor really worked.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Pasir dan batu sesuai diasingkan dengan...
Pasir dan batu = 沙和石头 题目问沙和石头适合用什么方法分开。线索是两者都是固体，但颗粒大小很不一样。回想第1步：大小不同时用什么工具。也想想沙和石会不会溶在水里。例子：厨房里用网筛把面粉里的结块留住。注意：石头大小不一，要想想最小的小石子会不会漏下去。
Pasir dan batu = sand and stones The question asks how to separate sand from stones. The clue is that both are solids, but their grain sizes are very different. Recall from Step 1 which tool suits materials of different sizes. Example: In the kitchen, a mesh strainer catches lumps in flour. Watch out: Stones come in many sizes, so think whether the tiniest pebbles could slip through too.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Serbuk besi dan pasir sesuai menggunakan...
Serbuk besi dan pasir = 铁粉和沙 题目问铁粉和沙要用什么分开。线索是“besi”，铁是一种金属。回想第1步：哪一种特性只有铁有，沙没有。也想想热水或开关能不能把铁粉拉出来。例子：回收厂把铁罐和铝罐分开，靠的就是只有铁罐才有的特性。注意：铁粉和沙一样细，靠大小分不开。
Serbuk besi dan pasir = iron filings and sand The question asks what to use to separate iron filings from sand. The clue is 'besi', which is iron, a metal. Recall from Step 1 which property iron has but sand does not. Also ask whether hot water or a switch could pull iron out. Example: Recycling centres sort iron cans from aluminium cans using a property only iron has. Watch out: Iron filings are as fine as sand, so sieving cannot split them.
Ringkasan
Syabas!
Kamu telah mengulang kaji bab Campuran.
Ingat: sifat bahan menentukan kaedah; larut dan tidak larut berdasarkan pemerhatian; tiga cara mempercepatkan pelarutan.
