用火點燃線香,線香可以燃燒的原因是什麼?

5上之3

Quiz
•
Chemistry
•
5th Grade
•
Medium
Tim Tim
Used 1+ times
FREE Resource
27 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
空氣中有氧氣
空氣中有二氧化碳
空氣可以被壓縮
空氣占有空間
2.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
用廣口瓶逐漸往下罩住燃燒中的蠟燭,蠟燭的火焰會逐漸變小;如果這時候把廣口瓶拿開,會有什麼變化?
燭火會變得比被罩住時小
燭火會變得比被罩住時大
燭火會馬上熄滅
沒有任何變化
3.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
用廣口瓶逐漸往下罩住燭火,燭火逐漸變小,此時拿掉廣口瓶,蠟燭又能繼續燃燒,這種現象可以證明什麼?
燃燒時,附近不能放置玻璃物品
廣口瓶可以降低溫度
廣口瓶遇熱會產生二氧化碳
燃燒需要空氣
4.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
利用廣口瓶和燃燒中的蠟燭進行燃燒是否需要空氣的實驗時,下列哪一項做法是不正確的?
燭火旁邊不能有容易燃燒的物品
身體要跟燭火保持適當的距離
固定好蠟燭,避免傾倒
蠟燭點燃後,用手拿著
5.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
下列哪一項不是雙氧水和金針菇混合所產生的氣體所具有的特性?
無色
無味
具有助燃性
會讓火焰馬上熄滅
6.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
製造氧氣時,為什麼要在廣口瓶的瓶口蓋上透明板呢?
使反應速度快一點
防止灰塵掉落
防止氣體散逸
防止溫度降低
7.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
利用下列哪一項器材或物品可以檢驗氧氣是否具有助燃性?
未點燃、乾燥的火柴棒
點燃的線香
裝在盒子裡未點燃的蠟燭
尚未點燃的酒精燈
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