教科版二年級科學(xué)下冊《磁極與方向》同步練習(xí)

第一單元磁鐵第4課時(shí)磁極與方向?

課后作業(yè)班級：姓名：難易度:tiankongti一、填空題。citienengzhTshiseyiduanzhTxiangnan1.磁鐵能指示,色一端指向南jiyongzimubiaoshiseyiduanzhTxiangbeiji極，用字母表示；色一端指向北極，yongzimubiaoshi用字母表示。zhTnanzhenshiwoguosidafamingzhTyishiliyongcitie2.指南針是我國四大發(fā)明之一，是利用磁鐵nenggouzhTshidetedianzhichengde能夠指示的特點(diǎn)制成的。panduanti二、判斷題。citiedehongsebufenshinanjiyongzimubiaoshi1.磁鐵的紅色部分是南極，用字母“S”表示。（）womenzaizudtiaoxingcitienengzhTshifangxiangshiyan2我們在做“條形磁鐵能指示方向”實(shí)驗(yàn)shixianyaobacitieyongbaizhTbaogudqTlaibingzailiang時(shí),先要把磁鐵用白紙包裹起來，并在兩duanxieshangshuzihudzimubianyuguancha端寫上數(shù)字或字母便于觀察。（）womenkeyTcaiyongxuanguafaduitixingcitiehuanxing.我們可以采用“懸掛法”對蹄形磁鐵（環(huán)形citiejinxingzhTshifangxiangdeshiyanTOC\o"1-5"\h\z\o"CurrentDocument"磁鐵）進(jìn)行指示方向的實(shí)驗(yàn)。（）zhTnanzhenshiliyongcitienenggouxTtiedetedianzhichengde\o"CurrentDocument".指南針是利用磁鐵能夠吸鐵的特點(diǎn)制成的。（）zhTyoutiaoxingcitienengzhTshifangxiang\o"CurrentDocument".只有條形磁鐵能指示方向。（）xuanzeti三、選擇題。womenshiyonglaiceshitixingcitiehehuanxing1.我們使用（）來測試蹄形磁鐵和環(huán)形citiedezhTxiangxing磁鐵的指向性。zhTjiafaxuanguafashouchifaA.支架法B,懸掛法C.手持法yigenenggouziyouzhuandongdecitiejingzhTshibeiji2一個(gè)能夠自由轉(zhuǎn)動(dòng)的磁鐵靜止時(shí)，北極zhTxiang指向（beiA.北zhTxiang指向（beiA.北fang）方。nanB.南wufapanduanC.無法判斷citiedecijiyoucitiedecijiyougezhTnandejiaonanjiyongzi3citiedecijiyougezhTnandejiaonanjiyongzi3.磁鐵的磁極有（3.磁鐵的磁極有（）3.磁鐵的磁極有（）個(gè)，指南的叫南極，用字母（）表示；指北的叫北極，用字母（）表shioA.1;S;NB.1;N;SC.2;S;Ntiantuti填圖題。guanchazhTnanzhendegouzaotianxiegebufenmingcheng.觀察指南針的構(gòu)造，填寫各部分名稱。biaopanzhTzhenkedu表盤②指針③刻度qlnggenjutiyizaituzhongydngzimubiaochucijide.請根據(jù)題意在圖中用字母標(biāo)出磁極的ming