Artikel ini membahas secara lengkap mengenai jenis dan sifat-sifat bahan yang ada di sekitar. Apa saja itu? Yuk, cari tahu!
—
Siapa yang pernah jatuhin gelas kaca sampai pecah?
Waduh horor banget tuh! Biasanya ya guys, mecahin gelas kaca sama aja kayak ngilangin tempat bekal. Udah kebayang, pasti diomelin ibu.
Hmm… kayaknya hampir semua orang pernah deh ngelakuin hal itu.
Eits, tapi kalo yang kamu jatuhin itu gelas plastik, ya gak sehoror itu wkwkwk.
Gelas kaca kalo jatuh dari ketinggian tertentu pasti akan pecah. Sebaliknya, gelas plastik nggak akan pecah dari ketinggian tertentu.
Loh kenapa bisa gitu ya?
Simpelnya gini, gelas kaca dan gelas plastik terbuat dari bahan yang berbeda. Makanya karakteristik dari kedua benda itu pasti berbeda.
Eits, tapi yang terpenting adalah kamu harus tau nih kalo sifat bahan disekitar kita itu nggak cuma kaca dan plastik aja, loh! Tapi, ada juga serat, karet, tanah liat, dan logam.
Waw, cukup banyak kan?
Yaudah langsung kita bahas satu per satu aja kuy!
Kita mulai dulu dari kaca deh.
1. Kaca
Bisa diinget nih guys, bahan utama dari kaca adalah silikon dioksida atau silika dengan rumus molekul SiO2. Bahan ini mudah ditemukan pada pasir kuarsa yang banyak ditemukan pada pasir pantai atau batuan kuarsa di daerah pegunungan. Contoh yang terbuat dari kaca adalah gelas, toples, cermin, alat masak dan alat gelas kimia.
Gelas kaca (sumber: ikea.com)
Bahan kaca ini luas dipakai karena memiliki keunggulan, yaitu:
-
Tahan terhadap korosi (perkaratan) dan juga zat kimia. Maka dari itu, kaca banyak dimanfaatkan untuk alat-alat laboratorium.
-
Kedap air, udara dan mikroorganisme. Hal ini juga yang membuat kaca dimanfaatkan sebagai alat rumah tangga.
Meskipun banyak keunggulan, bahan kaca ini juga memiliki kelemahan yaitu rapuh dan mudah pecah.
Baca juga: Yuk, Ketahui Jenis-Jenis Magnet dan Sifatnya
2. Plastik
Beda halnya dengan plastik, umumnya plastik diproduksi oleh manusia dari pengolahan minyak bumi. Benda-benda yang terbuat dari bahan plastik, nggak cuma gelas plastik aja ya, tapi ada juga ember, gayung, kantong plastik, dan… (kamu lanjutin deh, abis banyak banget sih!)
Nah, setelah tau contoh benda berbahan plastik, yuk cari tau karakteristik plastik!
- Tidak tembus air
- Mudah dibentuk dan dicetak
- Ringan
- Tidak mudah pecah
- Lentur
- Tembus pandang
- Bersifat isolator
Bahan plastik anti bocor, tapi mudah rusak pada suhu yang terlalu tinggi atau rendah. (sumber: inkuiri.com)
Selain keunggulan itu, plastik juga memiliki kelemahan, yaitu mudah rusak pada suhu tinggi atau suhu yang rendah.
3. Serat
Kamu pernah liat serat wol nggak? yang bentuknya kayak gini, loh!
Serat wol (sumber: indonesian.alibaba.com)
Nah, serat wol ini salah satu contoh bahan serat alami dari hewan. Jadi, serat itu dibagi 2 ya: serat alami dan serat sintetis. Eits, serat alami nggak cuma dari hewan aja ya, tapi ada juga dari tumbuhan, seperti contohnya kapas, serat kapuk, serat rami dan jute.
Baca juga: Fenomena Listrik Statis: Kenapa Petir Bisa Terjadi?
Serat sintetis disebut juga serat buatan, bisa dari bahan alami yang diregenerasi atau dari polimer sintetis yang umumnya adalah plastik. Contohnya, ada nilon, poliester, dan serat akrilat. Walaupun sintetis, karakteristik dari serat ini punya data serap yang rendah terhadap cairan dan lebih tahan sama serangan mikroorganisme.
Selain karakteristik di atas, serat sintetis memiliki keunggulan yang perlu kalian tahu, yaitu:
- Bersifat kuat
- Tidak mudah putus
- Isolator panas
- Isolator listrik
- Bertekstur lembut dan lentur
- Tidak mudah teroksidasi (bereaksi dengan oksigen)
Selain keunggulan, tentunya serat sintetis ini juga memiliki kekurangan yaitu mudah kusut dan kurang nyaman ketika digunakan sebagai bahan dasar pakaian karena panas dan kurang baik dalam menyerap keringat.
Next, kita bahas sifat bahan karet ya.
4. Karet
Karet itu disebut juga sebagai elastomer atau elastic polymer, yang berarti polimer yang elastis atau dapat kembali ke bentuk semula setelah ditarik atau direntangkan. Sama kayak serat, karet juga dibagi menjadi 2 jenis, ada yang alami dan sintetis.
Karet alami, pasti berasal dari alam. Misalnya, lateks atau getah pohon karet yang dapat diolah menjadi barang disekitar kita yang banyak manfaatnya, seperti ban, pembungkus kabel listrik, bahan pembuat sol dan masih banyak lagi.
Karet sintetis dibuat manusia untuk memperoleh sifat yang sesuai dengan kegunaanya. Bahan baku karet sintetis biasanya dari minyak bumi, batu bara, dan gas alam. Contoh dari karet sintetis adalah SBR atau styrene butadiene rubber. Karet jenis ini banyak dimanfaatkan sebagai ban kendaraan bermotor, pipa karet, gasket, segel dan pembungkus kawat listrik.
Nah, contoh lainnya ada NBR atau nitrile butadiene rubber yang digunakan sebagai seal mesin karena tahan terhadap minyak dan oli.
Contoh terakhir adalah adalah poliuretan yang digunakan untuk furniture seperti kursi, meja ataupun sofa.
Ohya, kalo kamu pernah liat pipa karet, gasket, segel, dan pembungkus kawat listrik?
Pembungkus kawat listrik (sumber: s-gala.com)
Nah, itu adalah contoh benda yang menggunakan karet sintetis.
Baca juga: Penerapan Listrik Dinamis Di Sekitar Kita
Meskipun sama-sama karet, namun terdapat perbedaan karakteristik karet alam dan sintetis. Untuk karet alam memiliki karakteristik sebagai berikut :
- Daya elastis yang baik
- Daya tahan tinggi terhadap keretakan
- Daya lengket yang tinggi terhadap berbagai bahan
- Tidak mudah menghantarkan panas
- Tahan hentakan yang berulang-ulang
Sedangkan karet sintetis memiliki karakteristik yang berbeda yaitu lebih tahan terhadap zat kimia, lebih stabil strukturnya dari karet alam dan harganya lebih murah dari karet alam.
5. Tanah Liat
Sekarang kita bahas sifat bahan yang kelima, yaitu tanah liat. Kalo kamu bepergian ke gunung, coba liat di lereng gunung ada tanah berwarna hitam keabuan, nah itu dia tanah liat!
Pasti kamu udah nggak asing kan sama tanah liat? Yup, tanah liat itu sering banget digunakan sebagai bahan baku kerajinan tangan, kayak gerabah, tembikar.
Contoh benda dari tanah liat, yaitu tembikar. (sumber: techno.okezone.com)
Terus, apa sih karakteristik dari tanah liat? Ini dia!
- Mempunyai sifat liat atau lengket
- Sulit menyerap air
- Dapat terpecah menjadi butiran-butiran yang sangat halus saat keadaan kering
- Berwarna hitam terang atau hitam keabu-abuan
6. Logam
Bahan terakhir yang kita bahas, yaitu logam. Nah bahan logam yang biasanya kita gunakan ada alumunium dan besi. Pasti kalian semua udah kenal sama 2 jenis bahan ini kan?
Alumunium biasanya dimanfaatkan untuk bahan bangunan, bahan kabel listrik, peralatan rumah tangga sampai bahan kemasan, loh! Sifat dari alumunium itu ringan dan bisa didaur ulang.
Terus, kalau besi gimana tuh?
Nah, besi sifatnya berbeda sama alumunium, sifat besi adalah keras dan dapat ditempa. Makanya banyak digunakan untuk alat pertanian seperti cangkul dan pisau.
Baca juga: Memahami Rumus dan Konsep Hukum Coloumb
Ohya, logam besi biasanya juga dicampur sama logam lain loh. Tujuannya supaya bisa dapetin bahan materi yang lebih baik. Contohnya nih, baja yang terdiri dari besi dan karbon. Baja tuh sifatnya keras banget dan kokoh, makanya gak heran ya kalo baja sering digunakan untuk penopang jembatan.
Jembatan terpanjang di dunia, The Danyang-Kunshan Grand Bridge. (sumber: ditegal.com)
Lanjut, ini adalah karakteristik dari logam:
- Permukaan mengkilap
- Sangat baik untuk menghantarkan listrik (bahan konduktor)
Oke, udah lengkap banget nih yang kita bahas mulai dari kaca sampai logam. Jangan lupa sifat atau karakteristik dari tiap bahan ya. Nah, karena materi sifat bahan ini banyak yang harus kamu ingat, jadi lebih baik kamu perbanyak latihan soal juga biar nggak gampang lupa.
Kamu bisa banget nih kerjakan soal-soal yang ada, nggak perlu takut nggak bisa jawab ya. Karena sekarang udah ada Roboguru. Kamu tinggal foto soal itu terus hitungan detik langsung keluar jawabannya. Keren banget kan, cus cobain langsung!
Referensi:
Types of Materials [Daring]. Tautan: letstalkscience.ca (Diakses pada 11 Februari 2022)
Sumber foto:
Gambar ‘Gelas Kaca’ [Daring]. Tautan: https://www.ikea.co.id/in/produk/pecah-belah/gelas-minum/storsint-art-60396282 (Diakses pada 21 Februari 2022)
Gambar ‘Ember Plastik’ [Daring]. Tautan: https://m.inkuiri.com/site/olx.co.id/rumah-tangga/furniture/pak-della-kursi-plastik-lion-star-ada-selusin.6e7db07dc65b5fbc55138d06b39c49ac57683ca2.id (Diakses pada 21 Februari 2022)
Gambar ‘Serat Wol’ [Daring]. Tautan: https://indonesian.alibaba.com/product-detail/mongolian-dehaired-cashmere-wool-top-fiber-60598176803.html (Diakses pada 21 Februari 2022)
Gambar ‘Pembungkus Kawat Listrik’ [Daring]. Tautan: https://www.s-gala.com/blog-post/kabel-listrik (Diakses pada 21 Februari 2022)
Gambar ‘Tembikar’ [Daring]. Tautan: https://techno.okezone.com/read/2016/11/10/56/1538320/kerajinan-tembikar-terkenal-di-peradaban-muslim (Diakses pada 21 Februari 2022)
Gambar ‘The Danyang-Kunshan Grand Bridge’ [Daring]. Tautan: https://www.ditegal.com/jembatan-terpanjang-di-dunia/jembatan-terpanjang-di-dunia-danyang-kunshan-grand-bridge-lazerhorse-org/ (Diakses pada 21 Februari 2022)
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<h1 class="content-title">
Mengenal 6 Jenis & Sifat Bahan Di Sekitar Kita | Fisika Kelas 9 </h1>
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<p class="content-author"><a href="https://www.ruangguru.com/blog/author/kak-efira-mt-saintek" class="">Kak Efira MT Saintek</a> </p>
<p class="content-info"><span>February 21, 2022 • </span> <span>7 minutes read</span></p>
<br />
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<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/09FIS%20-%20Sifat%20Bahan-01.jpg" alt="Jenis & Sifat Bahan" width="820" loading="lazy" style="width: 820px; margin-left: auto; margin-right: auto; display: block;"></p>
<blockquote>
<p style="text-align: center;"><em>Artikel ini membahas secara lengkap mengenai jenis dan sifat-sifat bahan yang ada di sekitar. Apa saja itu? Yuk, cari tahu!</em></p>
</blockquote>
<p style="text-align: center;"><em>—</em></p>
<p><span id="more-3511"></span></p>
<p style="text-align: justify;">Siapa yang pernah jatuhin gelas kaca sampai pecah?<span style="color: #008000;"></span></p>
<p style="text-align: justify;">Waduh horor banget tuh! Biasanya ya guys, mecahin gelas kaca sama aja kayak ngilangin tempat bekal. Udah kebayang, pasti diomelin ibu. <span style="color: #008000;"></span></p>
<p style="text-align: justify;">Hmm… kayaknya hampir semua orang pernah deh ngelakuin hal itu. <span style="color: #008000;"></span></p>
<p style="text-align: justify;">Eits, tapi kalo yang kamu jatuhin itu gelas plastik, ya gak sehoror itu wkwkwk.<span style="color: #008000;"></span></p>
<p style="text-align: justify;">Gelas kaca kalo jatuh dari ketinggian tertentu pasti akan pecah. Sebaliknya, gelas plastik nggak akan pecah dari ketinggian tertentu.<span style="color: #008000;"></span></p>
<p style="text-align: justify;"><em>Loh kenapa bisa gitu ya?</em> <span style="color: #008000;"></span></p>
<p style="text-align: justify;">Simpelnya gini, gelas kaca dan gelas plastik terbuat dari bahan yang berbeda. Makanya karakteristik dari kedua benda itu pasti berbeda. <span style="color: #008000;"></span></p>
<p style="text-align: justify;"><span style="font-weight: normal;">Eits, tapi yang terpenting adalah kamu harus tau nih kalo sifat bahan disekitar kita itu nggak cuma kaca dan plastik aja, loh!</span><strong> Tapi, ada juga serat, karet, tanah liat, dan logam.</strong><span style="color: #008000;"></span></p>
<p style="text-align: justify;">Waw, cukup banyak kan?<span style="color: #008000;"></span></p>
<p style="text-align: justify;">Yaudah langsung kita bahas satu per satu aja kuy!<span style="color: #008000;"></span></p>
<p style="text-align: justify;">Kita mulai dulu dari kaca deh.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">1. Kaca</h2>
<p style="text-align: justify;">Bisa diinget nih guys, bahan utama dari kaca adalah silikon dioksida atau silika dengan rumus molekul SiO<sub>2</sub>. Bahan ini mudah ditemukan pada pasir kuarsa yang banyak ditemukan pada pasir pantai atau batuan kuarsa di daerah pegunungan. Contoh yang terbuat dari kaca adalah gelas, toples, cermin, alat masak dan alat gelas kimia.</p>
<p style="text-align: center;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/gelas%20kaca.jpg" alt="jenis dan sifat bahan - gelas kaca" width="500" loading="lazy" style="width: 500px; margin-left: auto; margin-right: auto; display: block;"><em>Gelas kaca (sumber: ikea.com)</em></p>
<p style="text-align: justify; font-weight: normal;">Bahan kaca ini luas dipakai karena memiliki keunggulan, yaitu:</p>
<ul>
<li style="text-align: justify; font-weight: normal;">
<p><strong style="background-color: transparent;">Tahan terhadap korosi (perkaratan) dan juga zat kimia. </strong>Maka dari itu, kaca banyak dimanfaatkan untuk alat-alat laboratorium.</p>
</li>
<li style="text-align: justify; font-weight: normal;">
<p><strong style="font-size: 16px; background-color: transparent;">Kedap air, udara dan mikroorganisme. </strong><span style="font-size: 16px; background-color: transparent;">Hal ini juga yang membuat kaca dimanfaatkan sebagai alat rumah tangga.</span></p>
</li>
</ul>
<p style="text-align: justify;">Meskipun banyak keunggulan, bahan kaca ini juga memiliki kelemahan yaitu rapuh dan mudah pecah.</p>
<p style="text-align: justify; font-weight: bold;">Baca juga: <a href="/blog/mengenal-magnet-dan-sifatnya" rel="noopener">Yuk, Ketahui Jenis-Jenis Magnet dan Sifatnya</a></p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">2. Plastik</h2>
<p style="text-align: justify;">Beda halnya dengan plastik, umumnya plastik diproduksi oleh manusia dari pengolahan minyak bumi. Benda-benda yang terbuat dari bahan plastik, nggak cuma gelas plastik aja ya, tapi ada juga ember, gayung, kantong plastik, dan… (kamu lanjutin deh, abis banyak banget sih!)</p>
<p style="text-align: justify;">Nah, setelah tau contoh benda berbahan plastik, yuk cari tau karakteristik plastik!</p>
<ul>
<li aria-level="1">Tidak tembus air</li>
<li aria-level="1">Mudah dibentuk dan dicetak</li>
<li aria-level="1">Ringan</li>
<li aria-level="1">Tidak mudah pecah</li>
<li aria-level="1">Lentur</li>
<li aria-level="1">Tembus pandang</li>
<li aria-level="1">Bersifat isolator</li>
</ul>
<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/ember%20plastik.jpg" alt="jenis dan sifat bahan - ember plastik" width="500" loading="lazy" style="width: 500px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: center;"><em>Bahan plastik anti bocor, tapi mudah rusak pada suhu yang terlalu tinggi atau rendah. (sumber: inkuiri.com)</em></p>
<p style="text-align: justify;">Selain keunggulan itu, plastik juga memiliki kelemahan, yaitu mudah rusak pada suhu tinggi atau suhu yang rendah.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;"><strong>3. Serat</strong></h2>
<p style="text-align: justify;">Kamu pernah liat serat wol nggak? yang bentuknya kayak gini, loh!</p>
<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/serat%20wol.jpg" alt="jenis dan sifat bahan - serat wol" width="600" loading="lazy" style="width: 600px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: center;"><em>Serat wol (sumber: indonesian.alibaba.com)</em></p>
<p style="text-align: justify;">Nah, serat wol ini salah satu contoh bahan serat alami dari hewan. Jadi, serat itu dibagi 2 ya: serat alami dan serat sintetis. Eits, serat alami nggak cuma dari hewan aja ya, tapi ada juga dari tumbuhan, seperti contohnya kapas, serat kapuk, serat rami dan jute.</p>
<p style="text-align: justify; font-weight: bold;">Baca juga: <a href="/blog/ipa-kelas-9-mengapa-petir-bisa-terjadi" rel="noopener">Fenomena Listrik Statis: Kenapa Petir Bisa Terjadi?</a></p>
<p style="text-align: justify;">Serat sintetis disebut juga serat buatan, bisa dari bahan alami yang diregenerasi atau dari polimer sintetis yang umumnya adalah plastik. Contohnya, ada nilon, poliester, dan serat akrilat. Walaupun sintetis, karakteristik dari serat ini punya data serap yang rendah terhadap cairan dan lebih tahan sama serangan mikroorganisme.</p>
<p style="text-align: justify;">Selain karakteristik di atas, serat sintetis memiliki keunggulan yang perlu kalian tahu, yaitu:</p>
<ul>
<li aria-level="1">Bersifat kuat</li>
<li aria-level="1">Tidak mudah putus</li>
<li aria-level="1">Isolator panas</li>
<li aria-level="1">Isolator listrik</li>
<li aria-level="1">Bertekstur lembut dan lentur</li>
<li aria-level="1">Tidak mudah teroksidasi (bereaksi dengan oksigen)</li>
</ul>
<p style="text-align: justify;">Selain keunggulan, tentunya serat sintetis ini juga memiliki kekurangan yaitu mudah kusut dan kurang nyaman ketika digunakan sebagai bahan dasar pakaian karena panas dan kurang baik dalam menyerap keringat.</p>
<p style="text-align: justify;">Next, kita bahas sifat bahan karet ya.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">4. Karet</h2>
<p style="text-align: justify;">Karet itu disebut juga sebagai elastomer atau <em>elastic polymer</em>, yang berarti polimer yang elastis atau dapat kembali ke bentuk semula setelah ditarik atau direntangkan. Sama kayak serat, karet juga dibagi menjadi 2 jenis, ada yang alami dan sintetis.</p>
<p style="text-align: justify;">Karet alami, pasti berasal dari alam. Misalnya, lateks atau getah pohon karet yang dapat diolah menjadi barang disekitar kita yang banyak manfaatnya, seperti ban, pembungkus kabel listrik, bahan pembuat sol dan masih banyak lagi.</p>
<p style="text-align: justify;">Karet sintetis dibuat manusia untuk memperoleh sifat yang sesuai dengan kegunaanya. Bahan baku karet sintetis biasanya dari minyak bumi, batu bara, dan gas alam. Contoh dari karet sintetis adalah <strong>SBR atau <em>styrene butadiene rubber</em>. Karet jenis ini banyak dimanfaatkan sebagai ban kendaraan bermotor, pipa karet, gasket, segel dan pembungkus kawat listrik.</strong></p>
<p style="text-align: justify;">Nah, contoh lainnya ada <strong>NBR atau <em>nitrile butadiene rubber</em> yang digunakan sebagai seal mesin karena tahan terhadap minyak dan oli. </strong></p>
<p style="text-align: justify;">Contoh terakhir adalah adalah poliuretan yang digunakan untuk furniture seperti kursi, meja ataupun sofa.</p>
<p style="text-align: justify;">Ohya, kalo kamu pernah liat pipa karet, gasket, segel, dan pembungkus kawat listrik?</p>
<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/pembungkus%20kawat%20listrik.jpg" alt="jenis dan sifat bahan - pembungkus kawat listrik" width="500" loading="lazy" style="width: 500px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: center;"><em>Pembungkus kawat listrik (sumber: s-gala.com)</em></p>
<p style="text-align: justify;">Nah, itu adalah contoh benda yang menggunakan karet sintetis. </p>
<p style="text-align: justify; font-weight: bold;">Baca juga: <a href="/blog/ipa-kelas-9-penerapan-listrik-dinamis-di-sekitar-kita" rel="noopener">Penerapan Listrik Dinamis Di Sekitar Kita</a></p>
<p style="text-align: justify;">Meskipun sama-sama karet, namun terdapat perbedaan karakteristik karet alam dan sintetis. Untuk karet alam memiliki karakteristik sebagai berikut : </p>
<ul>
<li aria-level="1">Daya elastis yang baik</li>
<li aria-level="1">Daya tahan tinggi terhadap keretakan</li>
<li aria-level="1">Daya lengket yang tinggi terhadap berbagai bahan</li>
<li aria-level="1">Tidak mudah menghantarkan panas</li>
<li aria-level="1">Tahan hentakan yang berulang-ulang</li>
</ul>
<p style="text-align: justify;">Sedangkan karet sintetis memiliki karakteristik yang berbeda yaitu lebih tahan terhadap zat kimia, lebih stabil strukturnya dari karet alam dan harganya lebih murah dari karet alam.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;"><strong>5. Tanah Liat</strong></h2>
<p style="text-align: justify;">Sekarang kita bahas sifat bahan yang kelima, yaitu tanah liat. Kalo kamu bepergian ke gunung, coba liat di lereng gunung ada tanah berwarna hitam keabuan, nah itu dia tanah liat!</p>
<p style="text-align: justify;">Pasti kamu udah nggak asing kan sama tanah liat? Yup, tanah liat itu sering banget digunakan sebagai bahan baku kerajinan tangan, kayak gerabah, tembikar.</p>
<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/contoh%20tanah%20liat%20-%20tembikar.jpg" alt="contoh tanah liat - tembikar" width="600" loading="lazy" style="width: 600px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: center;"><em>Contoh benda dari tanah liat, yaitu tembikar. (sumber: techno.okezone.com)</em></p>
<p style="text-align: justify;">Terus, apa sih karakteristik dari tanah liat? Ini dia!</p>
<ul>
<li aria-level="1">Mempunyai sifat liat atau lengket</li>
<li aria-level="1"> Sulit menyerap air</li>
<li aria-level="1">Dapat terpecah menjadi butiran-butiran yang sangat halus saat keadaan kering</li>
<li aria-level="1">Berwarna hitam terang atau hitam keabu-abuan</li>
</ul>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;"><strong>6. Logam</strong></h2>
<p style="text-align: justify;">Bahan terakhir yang kita bahas, yaitu logam. Nah bahan logam yang biasanya kita gunakan ada alumunium dan besi. Pasti kalian semua udah kenal sama 2 jenis bahan ini kan?</p>
<p style="text-align: justify;">Alumunium biasanya dimanfaatkan untuk bahan bangunan, bahan kabel listrik, peralatan rumah tangga sampai bahan kemasan, loh! Sifat dari alumunium itu ringan dan bisa didaur ulang. </p>
<p style="text-align: justify;">Terus, kalau besi gimana tuh? </p>
<p style="text-align: justify;">Nah, besi sifatnya berbeda sama alumunium, sifat besi adalah keras dan dapat ditempa. Makanya banyak digunakan untuk alat pertanian seperti cangkul dan pisau.</p>
<p style="text-align: justify; font-weight: bold;">Baca juga: <a href="/blog/hukum-coulomb" rel="noopener">Memahami Rumus dan Konsep Hukum Coloumb</a></p>
<p style="text-align: justify;">Ohya, logam besi biasanya juga dicampur sama logam lain loh. Tujuannya supaya bisa dapetin bahan materi yang lebih baik. Contohnya nih, baja yang terdiri dari besi dan karbon. Baja tuh sifatnya keras banget dan kokoh, makanya gak heran ya kalo baja sering digunakan untuk penopang jembatan. </p>
<p style="text-align: justify;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/jembatan%20terpanjang%20di%20dunia.jpg" alt="jembatan terpanjang di dunia" width="600" loading="lazy" style="width: 600px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: center;"><em>Jembatan terpanjang di dunia, The Danyang-Kunshan Grand Bridge. (sumber: ditegal.com)</em></p>
<p style="text-align: justify;">Lanjut, ini adalah karakteristik dari logam:</p>
<ul>
<li aria-level="1">Permukaan mengkilap</li>
<li aria-level="1">Sangat baik untuk menghantarkan listrik (bahan konduktor)</li>
</ul>
<p style="text-align: justify;">Oke, udah lengkap banget nih yang kita bahas mulai dari kaca sampai logam. Jangan lupa sifat atau karakteristik dari tiap bahan ya. Nah, karena materi sifat bahan ini banyak yang harus kamu ingat, jadi lebih baik kamu perbanyak latihan soal juga biar nggak gampang lupa. </p>
<p style="text-align: justify;">Kamu bisa banget nih kerjakan soal-soal yang ada, nggak perlu takut nggak bisa jawab ya. Karena sekarang udah ada <a href="https://roboguru.ruangguru.com/"><strong><span>Roboguru</span></strong></a>. Kamu tinggal foto soal itu terus hitungan detik langsung keluar jawabannya. Keren banget kan, cus cobain langsung!</p>
<p><a href="https://roboguru.ruangguru.com/" target="_blank" style="text-align: center;" class="rg-cta" rel="noopener"><img fetchpriority="high" decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/cta/a80c2f9d-5f1a-424f-b9cf-6b4c6f362d2a.jpeg" width="648" height="227" alt="Roboguru Whatsapp" /></a></p>
<p style="font-weight: bold;">Referensi:</p>
<p>Types of Materials [Daring]. Tautan: letstalkscience.ca (Diakses pada 11 Februari 2022)</p>
<p style="font-weight: bold;">Sumber foto:</p>
<p style="text-align: left;">Gambar ‘Gelas Kaca’ [Daring]. Tautan: https://www.ikea.co.id/in/produk/pecah-belah/gelas-minum/storsint-art-60396282 (Diakses pada 21 Februari 2022)</p>
<p style="text-align: left;">Gambar ‘Ember Plastik’ [Daring]. Tautan: https://m.inkuiri.com/site/olx.co.id/rumah-tangga/furniture/pak-della-kursi-plastik-lion-star-ada-selusin.6e7db07dc65b5fbc55138d06b39c49ac57683ca2.id (Diakses pada 21 Februari 2022)</p>
<p style="text-align: left;">Gambar ‘Serat Wol’ [Daring]. Tautan: https://indonesian.alibaba.com/product-detail/mongolian-dehaired-cashmere-wool-top-fiber-60598176803.html (Diakses pada 21 Februari 2022)</p>
<p style="text-align: left;">Gambar ‘Pembungkus Kawat Listrik’ [Daring]. Tautan: https://www.s-gala.com/blog-post/kabel-listrik (Diakses pada 21 Februari 2022)</p>
<p style="text-align: left;">Gambar ‘Tembikar’ [Daring]. Tautan: https://techno.okezone.com/read/2016/11/10/56/1538320/kerajinan-tembikar-terkenal-di-peradaban-muslim (Diakses pada 21 Februari 2022)</p>
<p style="text-align: left;">Gambar ‘The Danyang-Kunshan Grand Bridge’ [Daring]. Tautan: https://www.ditegal.com/jembatan-terpanjang-di-dunia/jembatan-terpanjang-di-dunia-danyang-kunshan-grand-bridge-lazerhorse-org/ (Diakses pada 21 Februari 2022)</p>
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<li><a href="https://skillacademy.com/" target="_blank">Skill Academy</a></li>
<li><a href="https://www.ruangkerja.id/" target="_blank">Ruangkerja</a></li>
<li><a href="https://www.schoters.com/id/" target="_blank">Schoters</a></li>
<li><a href="https://www.kalananti.id/" target="_blank">Kalananti</a></li>
</ul>
</nav>
</div>
<div class="col-6 col-md-3">
<nav class="footer-menu">
<p class="title"> Coba GRATIS Aplikasi Ruangguru</p>
<div class="download-list">
<ul>
<li>
<a target="_blank" rel="nofollow" href="https://apps.apple.com/id/app/ruangguru-solusi-belajar/id1099742206?l=id">
<img src="https://cdn-web-2.ruangguru.com/static/appstore.png" loading="lazy" alt="Button App Store Footer " />
</a>
</li>
<li>
<a target="_blank" rel="nofollow" href="https://play.google.com/store/apps/details?id=com.ruangguru.livestudents&hl=in">
<img src="https://cdn-web-2.ruangguru.com/static/googleplay.png" loading="lazy" alt="Button Google Play Footer " />
</a>
</li>
<li>
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<img src="https://cdn-web-2.ruangguru.com/static/huawei.png" loading="lazy" alt="Button AppGallery Footer " />
</a>
</li>
</ul>
</div>
</nav>
</div>
</div>
</div>
</div>
<div class="d-lg-none text-center">
<nav class="footer-menu social">
<p class="title">Ikuti Kami</p>
<a target="_blank" href="https://www.instagram.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/instagram.png" loading="lazy" alt="Logo Instagram Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.facebook.com/ruanggurucom/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/facebook.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/facebook.png" loading="lazy" alt="Logo Facebook Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://twitter.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/twitter.png" loading=" lazy" alt="Logo Twitter Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.youtube.com/ruangguru">
<picture>
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</picture>
</a>
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</picture>
</a>
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</picture>
</a>
</nav>
</div>
<p class="footer-copyright">
© 2026 All Rights Reserved PT. Ruang Raya Indonesia
</p>
</div>
<style>
.bantuan-container {
position: relative;
}
.bantuan-element {
position: fixed;
z-index: 999;
display: flex;
align-items: flex-end;
justify-content: flex-end;
cursor: pointer;
transition: all 0.6s ease;
}
.bantuan-top {
bottom: 11rem;
right: 2rem;
}
.bantuan-bottom {
bottom: 2rem;
right: 2rem;
}
.bantuan-top-2 {
bottom: 15rem;
right: 2rem;
}
.bantuan-top-3 {
bottom: 19rem;
right: 2rem;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 2rem;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 2rem;
}
@media (min-width: 768px) {
.bantuan-element img {
width: auto;
transition: all 0.4s ease;
}
.bantuan-top img {
width: 140px;
}
.bantuan-bottom img {
width: 140px;
}
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 140px;
}
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 140px;
}
.bantuan-element.clicked {
bottom: 9rem;
right: 2.5rem;
}
.bantuan-element.clicked img {
width: auto;
height: 64px;
}
}
@media (max-width: 767px) {
.bantuan-top {
bottom: 8rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom {
bottom: 2rem;
right: 1.25rem;
align-items: center;
}
.bantuan-top-2 {
bottom: 12rem;
right: 1rem;
align-items: center;
}
.bantuan-top-3 {
bottom: 16rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 1.25rem;
align-items: center;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 1.25rem;
align-items: center;
}
.bantuan-element img {
width: auto;
}
.bantuan-top img,
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 96px;
}
.bantuan-bottom img,
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 96px;
}
}
.bantuan-element:hover {
transform: scale(1.05);
}
.bantuan-element img {
max-width: 100%;
height: auto;
}
</style>
<div id="bantuan-divs-container" style="position: relative" data-product="ruangguru" data-table="rg_floating_icon"></div>
<script>
class FloatingDivsComponent {
constructor(product = 'ruangguru', table = 'rg_floating_icon') {
this.container = document.getElementById('bantuan-divs-container');
this.floatingElements = [];
this.product = product;
this.table = table;
// Configuration
this.config = {
baseApiUrl: 'https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/rg_banner/views/',
apiKey: 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
maxElements: 2,
zIndexBase: 100,
};
// Build dynamic API URL based on table parameter
this.config.apiUrl = this.buildApiUrl();
this.init();
}
buildApiUrl() {
const baseUrl = this.config.baseApiUrl;
const tableName = this.table || 'rg_floating_icon';
const queryParams =
'offset=0&limit=99999&sort=rankPosition&where=(type,eq,floating)~and(showIn,anyof,blog)~and(hide,is,false)~and(product,eq,' +
this.product +
')&nested%5Bcta%5D%5Bfields%5D=Id,name,ctaId,imageUrl,ctaLink,targetUrl';
return `${baseUrl}${tableName}?${queryParams}`;
}
async init() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to initialize floating divs component:', error);
}
}
async fetchFloatingElements() {
try {
const options = {
method: 'GET',
headers: {
'xc-token': this.config.apiKey || 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
},
};
const urlNoco = this.config.apiUrl;
const response = await fetch(urlNoco, options);
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
this.floatingElements = this.processApiResponse(data);
} catch (error) {
console.error('Error fetching floating elements:', error);
throw error;
}
}
processApiResponse(data) {
if (!data || !data.list || !Array.isArray(data.list)) {
return [];
}
console.log(data.list);
// Ensure we only get maximum 2 elements
const limitedElements = data.list.slice(0, this.config.maxElements);
return limitedElements;
}
renderFloatingElements() {
if (!this.container || this.floatingElements.length === 0) {
return;
}
// Additional safeguard: ensure we never render more than maxElements
const elementsToRender = this.floatingElements.slice(0, this.config.maxElements);
// Clean up existing elements and their event listeners
this.cleanupExistingElements();
// Clear existing content
this.container.innerHTML = '';
elementsToRender.forEach((element, index) => {
const floatingDiv = this.createFloatingDiv(element, index);
this.container.appendChild(floatingDiv);
});
}
cleanupExistingElements() {
// Clear existing elements (no need for event listener cleanup with CSS approach)
const existingElements = this.container.querySelectorAll('[data-floating-element]');
existingElements.forEach(element => {
element.remove();
});
}
createFloatingDiv(element, index) {
const div = document.createElement('div');
const cta = element.cta[0]; // Use the first CTA
// Add data attribute for cleanup tracking
div.setAttribute('data-floating-element', 'true');
// Apply CSS classes based on rankPosition
const positionClass = this.getPositionClass(element.rankPosition, index);
div.className = `bantuan-element ${positionClass}`;
div.style.zIndex = this.config.zIndexBase + index;
// Create the link and image
const link = document.createElement('a');
link.href = 'https://cta.ruangguru.com/' + cta.ctaId || '#';
link.target = '_blank';
// Add tracking attributes
link.setAttribute('data-tracking-event-type', 'landing_page__core__item_click');
link.setAttribute(
'data-tracking-context',
JSON.stringify({
product_name: this.product,
cta_action: 'redirection',
cta_action_detail: link.href,
item_type: 'floating',
item_name: element.name || 'Floating element',
item_category: 'payment',
item_position: index,
item_serial: null,
section_type: 'floating_item',
section_position: 'body',
section_name: 'floating_item',
})
);
const img = document.createElement('img');
img.src = element.imageUrl + '?h=200&convert=webp';
img.alt = element.name || 'Floating element';
img.loading = 'lazy';
// Add click tracking
link.addEventListener('click', () => {
this.trackClick(element, cta);
});
link.appendChild(img);
div.appendChild(link);
return div;
}
getPositionClass(rankPosition, index) {
// Define positioning classes based on rankPosition
if (rankPosition === 1) {
return 'bantuan-top'; // Top position
} else if (rankPosition === 2) {
return 'bantuan-bottom'; // Bottom position
} else {
// For additional elements, distribute them evenly
return `bantuan-${index % 2 === 0 ? 'top' : 'bottom'}-${Math.floor(index / 2) + 1}`;
}
}
trackClick(element, cta) {
// Implement click tracking logic here
console.log('Floating element clicked:', {
elementId: element.Id,
elementName: cta.name,
ctaId: cta.ctaId,
targetUrl: cta.targetUrl,
});
}
// Public method to manually refresh
async refresh() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to refresh floating elements:', error);
throw error;
}
}
// Public method to get current floating elements
getFloatingElements() {
return [...this.floatingElements];
}
}
// Initialize the component when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
// Get product and table parameters from data attributes
const container = document.getElementById('bantuan-divs-container');
const product = container.getAttribute('data-product') || 'ruangguru';
const table = container.getAttribute('data-table') || 'rg_floating_icon';
new FloatingDivsComponent(product, table);
});
// Export for use in other modules if needed
if (typeof module !== 'undefined' && module.exports) {
module.exports = FloatingDivsComponent;
}
</script> <div id="wp-install-nudge" style="
position: fixed;
bottom: 0rem;
right: 0;
z-index: 999;
cursor: pointer;
"></div>
<script>
(function (w, d, s, o, f, js, fjs) {
w['Sales-Nudge-Widget'] = o; w[o] = w[o] || function () { (w[o].q = w[o].q || []).push(arguments) };
js = d.createElement(s), fjs = d.getElementsByTagName(s)[0];
js.id = o; js.src = f; js.async = 1; fjs.parentNode.insertBefore(js, fjs);
}(window, document, 'script', 'wpInstallNudge', 'https://cdn-web-2.ruangguru.com/sales-nudge/6198a95130/dist/widget.js'));
wpInstallNudge('init', { targetElementId: 'wp-install-nudge', clientTarget: 'ruangguru_blog' });
</script>
<script>
// note: disabled due to auto reload page
// var lastScrollTop = 0;
// $(window).scroll(function(event){
// var st = $(this).scrollTop();
// if (st > lastScrollTop){
// $('#wp-install-nudge').slideDown( "slow", function() {});
// } else {
// $('#wp-install-nudge').slideUp( "slow", function() {});
// }
// lastScrollTop = st;
// });
// $(document).ready(function () {
// $("#wp-install-nudge").hide();
// });
$('#wp-install-nudge').click(function(){
Analytics.track("promotion__install_nudge__click",
{
user_email: "ruangguru@blog.com",
cta_link: widgetData.dataConfig.target_link
}).catch((err) => {
console.log("tracker error", err);
});
});
</script>
</footer>
<div id="__next"></div>
<script type="speculationrules">
{"prefetch":[{"source":"document","where":{"and":[{"href_matches":"\/blog\/*"},{"not":{"href_matches":["\/blog\/wp-*.php","\/blog\/wp-admin\/*","\/blog\/wp-content\/uploads\/*","\/blog\/wp-content\/*","\/blog\/wp-content\/plugins\/*","\/blog\/wp-content\/themes\/ruangguru\/*","\/blog\/*\\?(.+)"]}},{"not":{"selector_matches":"a[rel~=\"nofollow\"]"}},{"not":{"selector_matches":".no-prefetch, .no-prefetch a"}}]},"eagerness":"conservative"}]}
</script>
<script>
async function getCtaDetails(ctaIds) {
const endpoint =
" https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/CTA/views/CTA?offset=0&limit=10&where=(ctaId,in," + ctaIds.toString() + ")";
try {
const response = await fetch(endpoint, {
headers: {
"xc-token": "-hG2nBDJzSj0agSgNtcJx97M4F02y54nUMoY6plJ",
},
});
const data = await response.json();
const ctaList = data?.list || [];
const ctaMap = new Map();
for (const ctaData of ctaList) {
ctaMap.set(ctaData.ctaId, ctaData);
}
return ctaMap;
} catch (error) {
console.error("Error fetching CTA details:", error);
return new Map();
}
}
async function replaceCTA() {
const regex = /{{cta\((‘(.*?)’|“(.*?)”)\)}}/g;
const bodyHTML = document.body.innerHTML;
const matches = Array.from(bodyHTML.matchAll(regex));
const ctaIds = matches.map((match) => {
let ctaId = match[2] ?? match[3];
return ctaId;
});
const ctaMap = await getCtaDetails(ctaIds);
const replacedHTML = bodyHTML.replace(regex, (match, _inner, ctaId1, ctaId2) => {
const ctaId = ctaId1 ?? ctaId2;
const ctaData = ctaMap.get(ctaId);
if (ctaData) {
return `<a href="https://cta.ruangguru.com/${ctaData.ctaId}" target="_${ctaData.targetType}" style="position:relative;display:inline-block;">
<img src="${ctaData.imageUrl}" loading="lazy" alt="${ctaData.altText}" />
</a>`;
} else {
return match;
}
});
document.body.innerHTML = replacedHTML;
}
</script>
<meta name="author" content="Ruangguru Tech Team">
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PVNLZFT" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- Tracker -->
<script type="text/javascript" src="https://cdn-web-2.ruangguru.com/landing-page-web/public/staticpages/global-assets/js/cta.js"></script>
<script src="https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.mjs" type="module"></script>
</body>
</html>