
下-單元2_防鏽與防腐
Authored by lin johnarp5806
Other
6th Grade

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60 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
因為鋼棉比較細,所以若以鋼棉代替鐵片進行「水與酸性水溶液對鋼棉生鏽的影響」實驗,可以減少實驗時間。
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
鐵製品遇到水與空氣才會生鏽,沉在海底的沉船沒有接觸到空氣,因此不會生鏽。
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
進行實驗時,操縱變因是不能改變的,必須保持相同。
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
陽光、月光都是造成鐵製品生鏽的主要原因。
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將鋼棉一半浸泡在水中、一半暴露在空氣中,水與空氣交界面的位置生鏽速度最快,表示鐵製品生鏽時需要空氣和水。
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
錐形瓶瓶口利用肥皂泡泡塗滿,當錐形瓶浸入熱水裡時,因瓶內的空氣膨脹而導致瓶口的泡泡會縮入瓶內。
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
懸掛的電線不能拉得太緊,是為了避免電線遇冷收縮而斷裂。
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