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1、Word文檔,下載后可任意編輯 教科版(2019秋) 三年級上冊第二單元 空氣 單元測試 (答案)MIME-version: 1.0 Content-Type: multipart/related; boundary=_NextPart_000_0076_01C29953.BE473C30; type=text/html X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. =_NextPart_000_0076_01C29953.BE473C3
2、0 Content-Type: text/html; Content-Transfer-Encoding: quoted-printable Content-Location: file:/C:/Users/ADMINI1/AppData/Local/Temp/tmp4cd9e71b-b980-4532-9e16-6b1755facaac525742.TMP.html 第二單元 空氣 單元測驗(yàn)卷-2021-2022學(xué)年科學(xué)三年級上冊-教科版(含答案) 一.選擇題1. 皮球打了氣才能彈起來,這是利用了空氣( )的特性。A.能被壓縮 B.能流動 C.比較輕2. 下面的物體都利用了空氣的一種性質(zhì),這
3、種性質(zhì)是( )。 A.空氣有固定的形狀 B.空氣可以占據(jù)一定空間且容易被壓縮 C.空氣可以流動3. 把一團(tuán)紙塞進(jìn)杯底有小孔的杯子,再把杯子倒過來,直立按入水中,那么( )。A.紙一定會濕 B.紙一定不會濕 C.無法確定4. 下列物質(zhì)不能流動的是( )。A.空氣 B.水 C.石頭5. 如下圖所示,堵住注射器管口,慢慢用力向下壓活塞,裝空氣的那支注射器的活塞比裝水的移動的距離會( )。 A.更小 B.更大 C.一樣6. 由實(shí)驗(yàn)可知,熱的空氣會( )。A.上升 B.下降 C.搖擺7. 在風(fēng)的模擬實(shí)驗(yàn)中,蚊香的作用是( )。A.驅(qū)蚊 B.借助煙霧觀察空氣流動 C.散發(fā)香味二.填空題1. 在空中、地下和
4、水中都有( )的蹤跡。2. 體積相同的空氣、水和石頭相比較,( )最輕。3. 熱氣球其實(shí)是利用( )會往上升的特點(diǎn)升空的。4. 17世紀(jì),科學(xué)家( )證明了空氣是有重量的5. 游戲時(shí),注射管口不能對著( )。6. 空氣總是在循環(huán)運(yùn)動的,空氣的流動形成( )。三.是非題1. 實(shí)驗(yàn)中經(jīng)常用到的一種方法是對比法。( )2. 自行車上的輪胎利用了壓縮空氣的原理。( )3. 空氣能占據(jù)空間,但沒有固定的形狀。( )4. 空氣加熱后體積會變大。( )5. 孔明燈最早是用來傳遞軍事信號的。( )6. 空氣可以被壓縮。( )四.問答題1. 如圖小木棒的A端掛著一個(gè)吹大的氣球,B端掛著一個(gè)筆帽,此時(shí)小木棒是水平
5、的。當(dāng)氣球里的空氣放出后,小木棒的哪一端會翹起來?為什么? 2. 通過做“熱氣球”實(shí)驗(yàn),請你簡單說一說孔明燈能夠升空的原因。參考答案 一.選擇題1. A2. B3. A4. C5. B6. A7. B二.填空題1. 空氣2. 空氣3. 熱空氣4. 伽利略5. 人6. 風(fēng)三.是非題1. 2. 3. 4. 5. 6. 四.問答題1. A端翹起,因?yàn)榭諝庥幸欢ㄖ亓?,氣球里的空氣放出后,左邊重量變輕2. 燃料燃燒使周圍空氣的溫度升高,從而排出孔明燈原有的空氣,使自身重力變小,空氣對它的浮力把它托了起來。=_NextPart_000_0076_01C29953.BE473C30 Content-Type
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52、 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD+/v4AAAAAAAAAAAAAAAAA/AAEB AQAAAAAA/AAAAAAD+/v4A/AAICAgD4+PgA/f39AAUFBQD7+/sA+Pj2APj59QAKCgoADAwM AAAAAAAEAwYA/8CAAMDAwD/8A/f39AP/wAAAAAA/AAQEBAAAAAAA/AAAAAAD6+voA AQEBAAcHBwD9/f0AAAAAAP39/QD/8AAwMDAAMDAwD/8A/Pz8APv7+wD/8ABQUFAAEBAQAA AAAAAQEBAAQEBAD9/
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