第七章 认识物质 复习
Quiz
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Science
•
7th - 9th Grade
•
Practice Problem
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Hard
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列事例中,能说明粒子在不停地做无规则运动的是( )。
细雨纷飞
桂花飘香
黄沙铺面
雪花飘飘
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列关于扩散现象的说法中,正确的是( )。
扩散现象只能说明粒子做无规则运动。
扩散现象只能说明粒子之间有空隙。
扩散现象既能说明粒子做无规则运动,也能说明粒子之间有空隙。
扩散现象既不能说明粒子做无规则运动,也不能说明粒子之间有空隙。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列各项中,物体与物质的对应错误的是( )。
铁锅-铁
衣服-布匹
铅笔-铅
玻璃瓶-玻璃
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列对物质的三态描述正确的是( )。
固态物质比液态物质重
液态物质具有一定的流动性
气态物质没有体积,不占据空间
固态、液态及气态物质都具有固定的形状
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
我们知道固体和液体都具有质量,下列说法能证明气体也具有质量的是( )。
充有空气的排球会变硬
充有气体的救生圈可以浮在水面上
充有气体的气球比没有重气的气球重
以上皆非
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
1平放的空气质量约为1.3 kg,若一间课室的长为8 m,宽为6 m,高为3 m,则空气的质量为 ( )。
23.4 kg
85.2 kg
152.4 kg
187.2 kg
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
扩散现象说明( )。
分子很轻
分子间存在间隙
物质是由分子组成的
分子处在不停地运动中
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