
初二上 chp2.3 密度与浮沉
Authored by 余春玲老师 余春玲老师
Science
9th Grade
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11 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
将一个铝制的空心球浸没在水内, 放手后,铝球将( )。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
将同一个不溶解的固体,分别加入A、B、C三种液体内,物体处于静止状态后如下图所示,则由此可知,此三种液体的密度大小关系为:( )。
ρA>ρB>ρC
ρA=ρB=ρC
ρA<ρB<ρC
ρA<ρB=ρC
3.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
冰会浮在水面上是因为冰的密度比水大。
4.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
鸡蛋能悬浮在盐水中,代表盐水的密度与鸡蛋的密度相等。
对
错
5.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
橡皮筋能浮在水面上,而后会沉入水底是因为橡皮筋的密度改变了。
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
橡皮筋一开始能浮在水面上是由于( )的关系。
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
三色奶茶的制作原理是利用了不同液体密度的差异,其中最上层的液体,其密度是三色奶茶中最()的。
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