
自然領域 Ch3-3 水溶液導電性小小測驗
Science
5th Grade
Used 2+ times

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31 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
醋、食鹽、小蘇打粉等物質溶於水中所形成的水溶液,都容易導電。
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2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有些水溶液容易導電,例如食鹽水、醋等
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3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
食鹽水容易導電,表示所有水溶液都容易導電。
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4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
發光二極體(LED)的長、短兩端分別代表正極、負極。
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5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
測試水溶液導電性的實驗中,醋、食鹽水、糖水等水溶液,都容易讓發光二極體發亮。
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6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
除了金屬能導電之外,有些水溶液也可以使電路形成通路,讓發光二極體發亮。
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7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
發光二極體的功能和一般燈泡一樣,連接在電路中,可以作為通路或斷路的判斷指標。
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