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      歡迎來到原中小學教育資源網!

      八年級物理走進實驗室測試題

      試題 時間:2018-04-21 我要投稿
      【www.51cxty.com - 試題】

        一、單項選擇題(每小題3分,共42分)每小題只有一個正確的選項,請把正確選項前面的字母代號寫在各題后的括號里。

        1.下列物體的長度,最接近1dm的是( )

        A.兵乓球的直徑; B.拳頭的寬度;

        C.2分硬幣的厚度 D.保溫瓶的高度.

        2.若四次測量一本書的寬度記錄為:12.38cm,12.36cm,12.38cm,12.34cm,則這本書寬度平均值是( )

        A.12.38cm. B.12.365cm. C.12.36cm. D.12.37cm.

        3.下列各式中表達正確的是( )

        A.7.2m=7.2100=720cm. B.7.2m=7.2m100=720cm.

        C.7.2m=7.2100cm=720cm. D.7.2m=7.2m100cm=720cm

        4.測量你身高時,應選用 ( )

        A.最小刻度是mm的米尺. B.最小刻度是cm的3m軟尺.

        C.最小刻度為mm的2m直尺. D.最小刻度為mm米的2m卷尺.

        5.圖1所示是刻度尺測一木塊的長度,下列記錄正確的是 ( )

        A.2.40cm. B.2.4cm.

        C.13.40cm. D.2.40m.

        6.下面敘述的幾種測量圓柱體周長的方法中,不能用的是 ( )

        A.把一紙條緊包在圓柱體上,在紙條重疊處用大頭針扎個孔,然后把紙條展開,用刻度尺量出兩孔之間的距離即是圓柱體的周長;

        B.在圓柱體上某點涂上顏色,使圓柱體在紙上滾動一圈。用刻度尺量出紙上兩顏色處之間的距離,即是圓柱體的周長;

        C.用細絲線在圓柱體上繞上一圈,量出絲線的長度即可;

        D.用一根橡皮筋拉緊在圓柱體上繞一圈,量出繞過圓柱體橡皮筋的長度即是圓柱體的周長。

        7.用刻度尺測量物理課本的長,以下哪個是產生誤差原因:( )

        A.刻度尺沒有跟課本的長邊平行;

        B.刻度尺沒有緊貼課本;

        C.讀數時,最小刻度的下一位數值估計不準確;

        D.觀察刻度尺時,視線沒有跟刻度尺尺面垂直.

        8.要測量1分硬幣的厚度,使測量結果的誤差較小,下列方法中最佳的是:( )

        A.用刻度尺仔細地測量硬幣地厚度;

        B.用刻度尺多次測量硬幣的厚度,然后求平均值;

        C.用刻度尺測量10個1分硬幣疊加起來的總厚度,再除以10,求平均值;

        D.用刻度尺分別測量10個1分硬幣的厚度,然后求平均值.

        9.一位同學用刻度均勻的米尺測量一張小桌面的邊長為0.98m,在將這把米尺跟標準米尺校對,發現此米尺的實際長度為1.002m,則這張小桌面的實際邊長約為:( )

        A.大于0.98m; B.小于0.98m; C.等于0.98m D.無法判斷.

        10.關于刻度尺的使用說法,錯誤的是:( )

        A.使用刻度尺時,尺要沿著所測物體 B.記錄結果時,要在數后加單位

        C.使用刻度尺測長度時,必須將尺的最左端與被測物體左邊對齊

        D.尺的放置和讀數時視線均不能歪斜

        11.下列說法中正確是( )

        A.多次測量求平均值可以消除因測量工具不精確而產生的誤差

        B.測量時選用的工具越精密越好

        C.學生用鋼尺的最大測量長度為15cm,因此,無法用它來測量長度約為50厘米的課桌的寬度

        D.測量長度時,也可以使用零刻度線磨損的尺子

        12.李煥同學用一把刻度尺4次測量物理課本的寬度,下列記錄數據中錯誤的是 ( )

        A.18.77cm B.18.76cm

        C.18.74cm D.18.89cm

        13.下列關于科學探究的說法中正確的是( )

        A.自然界中發生的現象,在實驗室內不可能重現

        B.進入實驗室后,首先要熟悉各種儀器的使用方法

        C.科學家有廣博的知識,不需要進行科學探究也能得出正確的結論

        D.實驗完畢后,不需要整理儀器,這是實驗員的事

        14.科學探究的第一步是( )

        A.猜想與假設 B.交流合作

        C.提出問題 D.分析論證

        二、填空題(每空1分,共26分)請把答案直接填在題中橫線上的空白處,不用寫出演算過程。

        15.物理學分為力學、熱學、電磁學、聲學、光學等許多分支學科,研究不同的學科需要不同實驗器材,依據你在實驗室中的收獲,寫出測長度的儀器 ,溫度的測量儀器

        ,質量的測量儀器 ,時間的測量儀器 。

        16.測量長度的基本工具是 ,小明同學的身高是1.68 (填上適當的單位).

        17.填下列數值的單位,使其符合實際情況:圓珠筆長度約1.35 ;學生鞋子的長度約24 ;床的寬度約14.5 。

        18.完成下列單位換算:

        8m =_________mm; 60km=____________dm。

        19.刻度尺的使用方法:

        (1)使用前先看_____ _ ___、___ ______、______ ____。

        (2)讀數時____ ____要與尺面垂直;

        (3)記錄測量結果時要記上_____ ___和____ ____ 。

        20.某人測得一本字典正文400頁厚度為18.0mm,則該字典正文每張紙厚度為_________mm。

        21.有兩支最小分度相同的刻度尺A和B,在室溫下測同一長度時結果相同;在40℃的室內測同一長度時分別為LA和LB,但LALB。若將這兩支尺拿到-20℃的室外測同一長度,結果分別為LA和LB,則LA___ __LB。(填、或=)

        22.用皮尺測量長度時,若皮尺拉得過緊,則測量結果偏__________。

        23.某同學利用柔軟棉線測出地圖上長江長63.00cm,北京至鄭州鐵路線長6.95cm。經查書,長江實際長度為6300km。則此地圖的比例尺為____________,北京至鄭州實際鐵路線長為___________。

        24.在微觀研究中,納m(nm)是_________物理量的單位;納m材料的特性之一是__________________。1nm=10-10m。某種可見光的波長為4000nm,合________m。

        25.2005年5月22日,中國重測珠峰高度的登山隊隊員成功登上了珠峰的頂峰。據權威科學家預測,此次測量結果將高于以前所知的珠峰高度8848.13 (填寫合適的長度單位).

        三 .實驗與探究題:(共32分)

        26.如圖2所示,用最小刻度不同的刻度尺測量物體A的長度。(4分)

        (1)圖(a)中,物體A長度為 cm。

        (2)圖(b)中,物體A長度為 cm。

        27.如圖3所示,在鉛筆上整齊排繞20匝漆包線,則漆包線直徑為 mm。(2分)

        28.有兩位同學測同一支鋼筆的長度,甲測得的結果是12.82cm,乙測得的結果是12.8cm,那么(1)若這兩位同學在測量時都沒有出現錯誤,則結果不同的原因是:___________________________________________________________________。

        (2)如果這兩位同學所用刻度尺的分度值都是1mm,則______同學的測量結果是錯誤的,原因是_____________________________________________________。(6分)

        29.某同學用滾動鐵環的方法來測學校花壇的周長。他測得鐵環的直徑為D,鐵環繞花壇一周滾動的圈數為N,則計算花壇周長L的公式為L=_____ ____。(2分)

        30.某同學為測定語文書的紙張厚度,采取如下步驟:(4分)

        a.量出一疊紙的厚度L

        b.選用學生用三角尺,檢查零刻度是否磨損

        c.計算每張紙的厚度d=L/100

        d.取得語文書內100頁疊齊壓緊

        上述步驟的正確排列順序(用序號字母)是________________________。

        31.如何測量一棵大樹的樹干直徑?(寫出所需器材及實驗步驟和相應表達式)(5分)

        32.對物體下落的快慢與物體輕重的關系,歷史上曾先后有過兩種不同的觀點:亞里士多德認為重的物體下落得快,而伽俐略認為輕重不同的物體下落的快慢是一樣的。下面是三位同學在研究了物體下落的快慢與物體輕重的關系后所作的交流:(6分)

        ⑴如果亞里士多德的觀點是對的,小剛的實驗結果應該是

        ⑵導致小強和下麗實驗結果不同的原因,主要是存在的干擾。

        33.在物理實驗室,你看到了哪些有趣的物理現象?有什么聯想?請舉2例。(6分)

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