
看見自然EP42:燃燒與滅火
Interactive Video
•
Science
•
5th Grade
•
Hard
Hui M
Used 1+ times
FREE Resource
4 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
紙張浸泡在某種液體中點燃後卻毫髮無傷,其秘密是什麼?
紙張浸泡的是純酒精
紙張浸泡的是純水
紙張浸泡的是水加酒精
紙張經過特殊處理
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
燃燒需要同時具備哪三個要素?
可燃物、助燃物、高溫
可燃物、助燃物、達到燃點
燃料、氧氣、火源
易燃物、空氣、熱源
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將紙張浸泡在純酒精中點燃後,紙張會完全燃燒,這是因為什麼?
酒精的燃點比紙張高
酒精燃燒時會吸收紙張的熱量
酒精燃燒時會使紙張達到燃點
純酒精是助燃物
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
根據燃燒三要素的原理,下列哪種方法無法有效滅火?
用水澆熄火源
用蓋子蓋住燃燒物
移除燃燒物周圍的氧氣
增加可燃物的數量
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