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5上自然3-3南一

Authored by 鄭紀菁 鄭紀菁

Science

5th Grade

Used 2+ times

5上自然3-3南一
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50 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

使用發光二極體測試水溶液的導電性時,發光二極體的長腳要與電池的正極相接,發光二極體的短腳要與電池的負極相接。

O
X

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

所有物質溶於水中後,都可以導電。

O
X

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

只有鹼性的水溶液才容易導電。

O
X

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

滴入紫色高麗菜汁後不會變色的水溶液都是好的導電物,例如:砂糖水。

O
X

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

生活中有些水溶液不容易導電,例如:砂糖水。

O
X

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

發光二極體具有體積小、用電省、壽命長等優點,近年來被廣泛應用在各種電器產品上。

O
X

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

食鹽水溶液和砂糖水溶液都會導電。

O
X

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