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自然五上第四單元

Authored by 李政導 李政導

Chemistry

5th Grade

Used 12+ times

自然五上第四單元
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50 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

小蘇打粉加入醋混合後所產生的氣體,可以使線香燃燒更旺盛。

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

將點燃的線香放入雙氧水和金針菇混合後產生氣體的瓶子中,線香會燃燒得更旺盛。

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

可以燃燒的物質,稱為助燃物。

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

將二氧化碳灌進氣球裡,能使氣球飄浮到天空中。

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

燭火可以在空氣中持續燃燒,是因為空氣中有氧。

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

發生森林大火時,消防員會砍倒部分樹木隔離火場,主要是去除燃燒三要件中的「可燃物」。

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

火災時利用乾粉滅火器滅火,是應用隔絕助燃物的原理。

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