LUYỆN NÓI: THUYẾT MINH VÊ MỘT THỨ ĐỒ DÙNG
<h3 style="text-align: justify;" id="i-chuan-bi-o-nhagrave">I - CHUẨN bị ở nhà</h3> <p style="text-align: justify;">Đề bài: "Thuyết minh về cái phích nước (bình thuỷ)".</p> <h4 style="text-align: justify;">1. Yêu cầu</h4> <p style="text-align: justify;">Trình bày được công dụng, cấu tạo, nguyên lí giữ nhiệt và cách bảo quản.</p> <h4 style="text-align: justify;">2. Quan sát và tìm hiểu</h4> <p style="text-align: justify;">- Trước hết hãy xác định phích nước là một thứ đồ dùng thường có trong mỗi gia đình và công dụng của nó.</p> <p style="text-align: justify;">- Xác định cái phích nước do những bộ phận nào tạo thành:</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_3_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_3" name="aswift_3" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=2496579566&amp;pi=t.aa~a.1694800419~i.13~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690918110&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fluyen-noi-thuyet-minh-ve-mot-thu-do-dung-2087G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690918109997&amp;bpp=1&amp;bdt=1089&amp;idt=-M&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280&amp;nras=3&amp;correlator=3889718631709&amp;frm=20&amp;pv=1&amp;ga_vid=1476616241.1690918109&amp;ga_sid=1690918109&amp;ga_hid=2026211884&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=1064&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076578%2C42531705%2C44788442&amp;oid=2&amp;pvsid=146835053268006&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=4&amp;uci=a!4&amp;btvi=2&amp;fsb=1&amp;xpc=c4avCjBwKe&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=32" data-google-container-id="a!4" data-google-query-id="CNeVt-qYvIADFTJbDwId-lINqQ" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">+ Bộ phận quan trọng nhất của phích nước là ruột phích được cấu tạo như thế nào để giữ nhiệt? (<em>Gợi ý:</em> hai lớp thuỷ tinh, ở giữa là chân không làm mất khả năng truyền nhiệt ra ngoài; phía trong lớp thuỷ tinh được tráng bạc nhằm hắt nhiệt trở lại để giữ nhiệt; miệng bình nhỏ làm giảm khả năng truyền nhiệt; hiệu quả giữ nhiệt: trong vòng 6 tiếng đồng hồ nước từ 100 độ còn giữ được 70 độ.</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_4_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_4" name="aswift_4" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=4280474192&amp;pi=t.aa~a.1694800419~i.15~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690918110&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fluyen-noi-thuyet-minh-ve-mot-thu-do-dung-2087G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690918109997&amp;bpp=1&amp;bdt=1090&amp;idt=-M&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280%2C741x280&amp;nras=4&amp;correlator=3889718631709&amp;frm=20&amp;pv=1&amp;ga_vid=1476616241.1690918109&amp;ga_sid=1690918109&amp;ga_hid=2026211884&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=1491&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076578%2C42531705%2C44788442&amp;oid=2&amp;pvsid=146835053268006&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=5&amp;uci=a!5&amp;btvi=3&amp;fsb=1&amp;xpc=nAqft0IXwu&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=40" data-google-container-id="a!5" data-google-query-id="CLSCu-qYvIADFb1ZDwIdWTgIcA" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">+ Bộ phận vỏ phích làm bằng gì, có tác dụng bảo quản ruột phích như thế nào?</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_5_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_5" name="aswift_5" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=39315810&amp;pi=t.aa~a.1694800419~i.17~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690918110&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fluyen-noi-thuyet-minh-ve-mot-thu-do-dung-2087G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690918109997&amp;bpp=1&amp;bdt=1090&amp;idt=1&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690917835%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280%2C741x280%2C741x280&amp;nras=5&amp;correlator=3889718631709&amp;frm=20&amp;pv=1&amp;ga_vid=1476616241.1690918109&amp;ga_sid=1690918109&amp;ga_hid=2026211884&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=1817&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076578%2C42531705%2C44788442&amp;oid=2&amp;pvsid=146835053268006&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=6&amp;uci=a!6&amp;btvi=4&amp;fsb=1&amp;xpc=mPXhD3uLf6&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=88" data-google-container-id="a!6" data-google-query-id="COGQvOqYvIADFataDwIdoMYJpA" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">- Bảo quản và sử dụng phích như thế nào để khỏi vỡ, nước sôi không gây nguy hiểm cho trẻ em?</p> <h4 style="text-align: justify;">3. Lập dàn ý</h4> <p style="text-align: justify;">- Dàn ý đủ các phần Mở bài, Thân bài, Kết bài với các ý trong từng phần.</p> <p style="text-align: justify;">- Dự kiến sử dụng các phương pháp thuyết minh nào?</p> <h3 style="text-align: justify;" id="ii-luyen-noacutei-trecircn-lop">II - LUYỆN NÓI TRÊN LỚP</h3> <p style="text-align: justify;">- Luyện nói theo dàn ý đã chuẩn bị trước tổ, nhóm.</p> <p style="text-align: justify;">- Một số học sinh được chọn nói trước lớp.</p>