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Science
1st Grade - Professional Development
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16 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
谁是发现地心引力的科学家?
霍金
牛顿
爱因斯坦
居里夫人
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图中显示一种现象。选出有关图1现象的正确解释。
这种现象形成白昼和黑夜
果实掉落地面是因为地心引力
物体漂浮是因为地球绕太阳公转
这种现象的发生是因为地球从东转向西
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
所有生物和非生物都可以牢牢地吸引在地球表面是因为有 _______________ 。
磁铁
地球转动
地心引力
光合作用
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图中显示一名宇航员。为什么宇航员在太空中漂浮?
宇航员很轻
宇航员穿的航天服很轻
宇航员摆脱了地心引力,处于失重状态
航天服里装有使宇航员飘起来的推进器
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图中显示俊杰在篮球场上投篮的情况。如果没有地心引力,将会怎样?
他无法抛出篮球
篮球还是会掉下来
篮球会漂浮在空中
他无法将篮球投进
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是地心引力?
造成潮汐的力
让植物生长的力
把物体吸向地球的力
让地球环绕太阳运转的力
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
爬楼梯时比下楼梯轻松,这是受到地心引力的影响。
对
错
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