國小自然5下ch2-1溶解在水中的物質
Quiz
•
Chemistry
•
5th Grade
•
Practice Problem
•
Medium
翰林出版國中自然 翰林出版國中自然
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用日晒蒸發海水中的水分後,可以觀察到什麼現象?
留下糖的結晶
留下黑色物質
留下鹽的結晶
沒有留下任何物質
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
怎樣做可以使溶解在水中的糖再變回固體?
將糖水加熱
加入更多糖
加入更多水
以上皆不可
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一個方法無法取回溶解在水中的糖?
放在太陽下晒
用酒精燈加熱
放在通風處
在糖水中加入更多的水
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用下列哪一個方法,可以取回溶解在水中的食鹽?
加入熱水
加入更多食鹽攪拌
用濾紙過濾
放在太陽底下
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列物品中,哪一項並非從水溶液中取出?
芝麻粉
黑糖
奶粉
粗鹽
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
取一滴濃食鹽水滴在玻璃片上,下列哪一種方法可以加快食鹽水的水分蒸發,更快取得食鹽結晶?
放在陽光下曝晒
滴入更多水
加入砂糖
放入夾鏈袋密封
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
取適量的食鹽水溶液放在蒸發皿中,加熱一段時間後,可以觀察到什麼變化?
食鹽水溶液變混濁
水分蒸發,蒸發皿中沒有任何物質
水分蒸發,蒸發皿中有食鹽的結晶
沒有任何變化
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