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自然領域 Ch3-3 水溶液導電性小小測驗

Science

5th Grade

Used 2+ times

自然領域 Ch3-3 水溶液導電性小小測驗
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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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