教科版（2019秋） 三年級(jí)上冊(cè)第二單元 空氣 單元測(cè)試 （答案）-2

1、Word文檔，下載后可任意編輯 教科版（2019秋） 三年級(jí)上冊(cè)第二單元 空氣 單元測(cè)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/tmp773f9769-5f8e-4b94-9b65-03ef221b311b525742.TMP.html 第二單元 空氣 單元測(cè)驗(yàn)卷-2021-2022學(xué)年科學(xué)三年級(jí)上冊(cè)-教科版（含答案） 一.選擇題1. 下列現(xiàn)象與空氣熱脹冷縮有關(guān)的是 （ ）。A.夏天，打開雪碧的瓶蓋，瓶口有氣體冒出B.熱氣球升空C.用降溫的方法，使空氣被壓縮2.

3、 在風(fēng)的模擬實(shí)驗(yàn)中，紙箱上面的洞形成的風(fēng)的方向是（ ）。A.向上 B.向下 C.向左3. 下列工具中,最適合用來證明空氣有質(zhì)量的是（ ）。A.桿秤 B.彈簧秤 C.細(xì)木棒制成的小天平4. 往一個(gè)裝滿空氣的玻璃瓶中在打進(jìn)一些空氣，會(huì)發(fā)現(xiàn)瓶子的（ ）。A.質(zhì)量不變 B.質(zhì)量增大 C.質(zhì)量減小5. 把一團(tuán)紙緊緊塞在杯底，將杯子倒立壓入水中，紙團(tuán)不會(huì)濕，能夠說明空氣（ ）。A.有質(zhì)量 B.占據(jù)一定的空間 C.能流動(dòng)6. 如圖所示，蠟燭可以在空氣充足的情況下點(diǎn)燃，說明空氣（ ）。 A.可以被加熱 B.可以幫助燃燒 C.會(huì)流動(dòng)二.填空題1. 空氣具有能（ ）、（ ）、（ ）、（ ）、（ ）、（ ）、（ ）

4、等的特征。2. 由于（ ）存在著嚴(yán)重的火災(zāi)隱患，請(qǐng)盡量不要燃放（ ）。3. 物體可以分為（ ）、（ ）和（ ）三種類型。4. 風(fēng)實(shí)際上是（ ）。5. 水、石頭有一定的重量，占據(jù)一定的空間，空氣也有（ ），也（ ）。6. 空氣能占據(jù)一定的（ ），空氣也有（ ）。三.是非題1. 風(fēng)是有級(jí)別的，級(jí)別越大，風(fēng)力越大，破壞力越大。（ ）2. 木頭有質(zhì)量，水有質(zhì)量，空氣沒有質(zhì)量。（ ）3. 植物的根埋在土壤里，所以植物的根不需要空氣。（ ）4. 用自制的小天平可以精確地測(cè)量出一個(gè)氣球內(nèi)空氣的質(zhì)量。（ ）5. 按照不同的形態(tài)可把物體分為固態(tài)、液態(tài)、氣態(tài)三種類型。 （ ）6. 具有流動(dòng)性是水和空氣的共同特點(diǎn)之

5、一。（ ）四.問答題1. 簡(jiǎn)述熱氣球的制作方法。2. 請(qǐng)你說出空氣的三個(gè)特點(diǎn)。3. 小紅是個(gè)小小科學(xué)謎，在家里做了這樣一個(gè)實(shí)驗(yàn)，把一團(tuán)紙巾放在一個(gè)杯子的杯底，然后將杯子豎直倒扣在水中，（如下圖所示），出現(xiàn)的怎樣的實(shí)驗(yàn)結(jié)果？為什么會(huì)出現(xiàn)這樣的結(jié)果？ 4. 把帶膠塞的漏斗擰緊在瓶口上，朝漏斗里倒水，水能流進(jìn)瓶子里嗎？為什么？參考答案 一.選擇題1. B2. A3. C4. B5. B6. B二.填空題1. 流動(dòng)；易壓縮；能占據(jù)空間；有質(zhì)量；無色；無味；透明2. 孔明燈；孔明燈3. 固體；液體；氣體4. 空氣的流動(dòng)5. 一定重量；占據(jù)一定空間6. 空間；質(zhì)量（重量）三.是非題1. 2. 3. 4.

6、5. 6. 四.問答題1. 用細(xì)布或軟紙做個(gè)類似熱氣球形狀的口袋,除了口以外不能漏氣,用細(xì)繩串住口袋的幾個(gè)邊緣,繩子另一頭再系住類似熱氣球下邊的小籃子,注意均勻平衡,繩子長短要一樣,在籃子上放個(gè)小蠟燭撐起口袋別被燒了,然后就可以點(diǎn)燃蠟燭,等熱氣充滿口袋的時(shí)候就可以適當(dāng)?shù)乃墒?等待升天吧。所選材料要輕。注意比列一定要合適,避免風(fēng)吹。2. 很輕，無色無味，有流動(dòng)性。3. 答：紙巾不會(huì)濕，原因是杯子里有空氣，空氣會(huì)占據(jù)空間。4. 不能（開始會(huì)流幾滴）。因?yàn)槠孔永锏目臻g被空氣占據(jù)著，膠塞封住了瓶口，空氣出不來，所以漏斗里的水就流不進(jìn)去。=_NextPart_000_0076_01C29953.BE47

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