G8 TEXT
Authored by janine feng
Science
8th Grade
Used 7+ times
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21 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一壶水烧开了，壶盖被顶开，这是因为 （ ）
水分子间空隙变大
水分子体积变大
水分子数目增多
水分子质量变大
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
用分子的观点对下列现象的解释错误的是 （ ）
花香四溢---分子在不停的运动
食物腐烂---分子本身发生改变
空气液化---分子间隙改变
汽油挥发---分子体积变大
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
铜的元素符号是（ ）
Cu
Mg
Ca
Au
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
镍的元素符号为（ ）
Ni
NI
Na
N
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
地壳中含量最多的元素是（ ）
Si
Al
O
Fe
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列说法正确的是（ ）
水中不含氧元素
水中不含氧原子
水中不含氧分子
水中不含水分子
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列物质中属于纯净物的是（ ）
碘酒
空气
氧化钙
生铁
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