
三年级 科学单元7 复习
Authored by SuSan Lee
Science
1st - 12th Grade
Used 888+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
观察图片,哪个球的密度 大 于水?
A
B
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
观察图片,哪个球的密度 小 于水?
A
B
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
我们可以用什么方法来增加水的密度?
(答案超过一个)
把 盐 加入水中
把 糖 加入水中
把 油 加入水中
把 热水 加入水中
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
为什么把同样大小的铁块和木块放入水里,铁块在水中是沉的,而木块是浮的?
因为铁块的密度大于水,木块的密度小于水。
因为铁块比较重,木块比较轻。
因为铁块的密度小于水,木块的密度大于水。
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
如何让沉入水中的鸡蛋浮起来?
(答案超过一个)
往水里加盐。
往水里加糖。
往水里施魔术。
加更多的水。
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
重的物体不一定会沉,轻的物体也不一定会浮。
以上的说明是正确还是错误?
正确
错误
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
物体在水里是沉还是浮与什么有很大的关系?
轻重
密度
大小
长短
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