四年级科学 地心引力
Quiz
•
Science
•
1st - 12th Grade
•
Medium
CHANG Moe
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5 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
物体会落在地面是因为有______________。
地心引力
天气变化
魔术的存在
想象力
2.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
什么是地心引力?
答案可多个。
一切有质量的物体之间产生的互相吸引的作用力。
所有的东西都被地球阻止移动
所有的东西都被一种力量吸引着
阻止地上的东西脱离地面
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
自行车能固定在它的位置是因为?
摩檫力
移动力
漂浮力
地心引力
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如果没地心引力,地球会发生什么现象?
地球运转时间变长
地球不会绕着轨道运转
地球上的东西都会飘浮在空中
没有什么变化
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪个现象可以证明地球有地心引力?
飞机能在高空中飞行
喷泉的水往上喷,最后又落下
大力把篮球往地上丢,篮球会反弹
从中午至晚上,室外的物体的影子逐渐变长
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