将冰块、和铜棒放入水中后,小丽发现冰块浮在水面上而铜棒往下沉。以下哪一个说法【不正确】?
第二章-密度

Quiz
•
Other
•
7th - 8th Grade
•
Medium
纤淞 黄
Used 26+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
冰块的密度最小
水的密度最大
铜棒的密度比水大
水的密度比冰块大
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
鉴别一个物体是否为实心体的方法是测量该物体的( )。
面积
密度
体积
质量
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
当建筑物遭遇火灾时,受困人员应该采取弯腰甚至匍匐的姿势撤离火场,这样能避免吸入有害气体,这是因为含大量有害气体的空气( )。【复选题,全部选择正确才算分】
温度较高
密度小
能大量集中在房间上方
能大量集中在房间下方
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
汤圆在水中煮熟之前,会沉;汤圆煮熟之后,会浮。这是为什么呢?
汤圆的体积变大
汤小的体积变小
汤圆的体积保持不变
无法判断
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
小明发现他游泳时会感到胸闷,这正是因为( )引起的。
水的压强
大气压强
水的面积
水的体积
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一个空瓶的质量为50g, 盛满水的质量为550g,求空瓶的容积。
500cm3
400cm3
300cm3
200cm3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪一个温度能让水达到最大的密度呢?
4度
小过4度
大过4度
无法确定
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
请照水的压强顺序排列号码。
3>2>1
1>2>3
3>1>2
2>1>3
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