Senaraikan bahan, kemudian bandingkan saiz, tarikan magnet, sama ada terapung dan sama ada larut. Maklumat ini menentukan kaedah.
Langkah 1
Kenal pasti bahan dalam campuran
Senaraikan bahan, kemudian bandingkan saiz, tarikan magnet, sama ada terapung dan sama ada larut. Maklumat ini menentukan kaedah.
campuran → kenal bahan → banding sifat
Kenal pasti bahan dalam campuran = 认出混合物里的物质 先列出混合物里有哪些东西。再比较它们的大小、会不会被磁铁吸、会不会浮、会不会溶解。这些资料决定要用哪种方法。例子：一碗绿豆混了碎树叶，先写下“绿豆、树叶”，再比较谁会浮。注意：漏写一种物质，后面选的方法就可能不对。
Kenal pasti bahan = identify the materials First list every material in the mixture. Then compare their size, whether a magnet attracts them, whether they float and whether they dissolve. This information decides the method. Example: A bowl of green beans mixed with bits of leaves: write 'beans, leaves', then test which one floats. Watch out: Missing one material in your list can lead to the wrong method later.
Langkah 2
Pilih kaedah yang sepadan
Nyatakan kaedah seperti menyisih, mengayak, magnet, mengapung atau menuras, kemudian hubungkan pilihan itu dengan sifat bahan.
kaedah + sifat yang digunakan
Pilih kaedah yang sepadan = 选配合的方法 说出方法，例如挑出、筛、用磁铁、让它浮起或过滤。再说明这个方法是靠哪种特性。答案要把“方法”和“特性”连在一起。例子：豆子里有小石子，用手挑出，因为石子颜色和形状不同。注意：只写方法不写原因，答案不完整。
Pilih kaedah yang sepadan = choose the matching method Name a method such as picking out, sieving, using a magnet, floating or filtering. Then link it to the property it depends on. A full answer joins the method and the property. Example: Pick small stones out of beans by hand because their colour and shape are different. Watch out: Writing only the method without the reason makes the answer incomplete.
Langkah 3
Baca syarat penyiasatan kelarutan
Periksa faktor yang diubah dan faktor yang dikekalkan. Gunakan pemerhatian masa pelarutan atau bahan masih kelihatan sebagai bukti.
Syarat penyiasatan = investigation conditions When reading a dissolving experiment, find the one factor that changed and the factors kept the same. Use the dissolving time, or whether the material is still visible, as evidence, then write a conclusion. Example: Only the water temperature differs; the hot cup clears in 2 minutes and the cold cup in 6, so hot water is faster. Watch out: Never name a factor that stayed the same as the cause.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Campuran klip dan beras paling sesuai diasingkan dengan...
Klip dan beras = 夹子和米 题目问夹子和米混在一起，最适合用什么方法分开。先想夹子是用什么做的，米又是什么。回想第1步，比较它们的特性有什么不同。也想想米会不会溶在热水里，或能不能被过滤留住。例子：钢螺丝掉进绿豆堆，可以靠铁的特性把它找回来。注意：“最适合”表示要选最快又干净的方法。
Klip dan beras = paper clips and rice The question asks the best way to separate paper clips from rice. First think about what clips are made of and what rice is. Compare their properties as in Step 1. Also consider whether rice would dissolve in hot water or be trapped by filtering. Example: Steel screws dropped into green beans can be recovered using a property of iron. Watch out: 'Paling sesuai' means pick the quickest and cleanest way, not just any way.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Mengapa ayak sesuai untuk tepung dan batu kecil?
Ayak untuk tepung dan batu kecil = 用筛子分面粉和小石 题目问为什么筛子适合分开面粉和小石子。想想筛子怎样工作：网孔让一些东西漏下去。再比较面粉和小石子哪里不一样。发光、气体的说法，用常识检查。例子：筛米时，细碎的米糠漏下，整粒米留在上面。注意：面粉和石子都是固体，不是气体。
Ayak untuk tepung dan batu kecil = sieving flour and small stones The question asks why a sieve suits flour and small stones. Think about how a sieve works: its holes let some things fall through. Then compare how flour and little stones differ. Use common sense on choices about light or gas. Example: When rice is sieved, fine husk dust falls through while whole grains stay on top. Watch out: Flour and stones are both solids, not gases.
Ringkasan
Syabas!
Kamu telah menjawab soalan ulang kaji bab Campuran.
Ingat: kenal pasti bahan dalam campuran; pilih kaedah yang sepadan; baca syarat penyiasatan kelarutan.
