科学复习回答方式 (第1至5单元)
Quiz
•
Science
•
5th Grade
•
Practice Problem
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
以下哪个是操作性定义的回答格式?
所做的事项,所控制的事项
所做的事项,所观察的事项
所观察的事项,所控制的事项
所做的事项,所固定的事项
2.
FILL IN THE BLANK QUESTION
1 min • 2 pts
一个公平的实验会有多少个操纵性变数?
3.
MULTIPLE SELECT QUESTION
1 min • 2 pts
以下哪项是正确的假设?
植物的数量越多,一个星期后,植物的高度越高。
森林砍伐的面积越大,动植物的数量越少。
随着时间的增加,被加入酵母菌的面团的体积越大。
螺旋桨转动的次数越多,船只移动的距离越近。
4.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
以下哪个种类的微生物和图里的相同?
酵母菌
眼虫
2019冠状病毒
肺炎链球菌
5.
MULTIPLE SELECT QUESTION
1 min • 2 pts
以下哪个人类的繁殖器官和功能的搭配是正确的?(有多个答案)
睾丸 - 产生卵子
子宫 - 胚胎或胎儿生长的地方
阴道 - 精子进入的管道
阴囊 - 提供精子养分
卵巢 - 分泌雌性激素
6.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
什么是对照组?选出最正确的答案。
一个没有反应性变数的实验装置
一个没有固定性变数的实验装置
一个没有操纵性变数的实验装置
一个没有目的的实验装置
7.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
一个学生制作了橡皮筋动力船来进行实验。实验的目的是为了研究扭转螺旋桨的圈数和船只在3秒内移动的距离之间的关系。以下哪个是船只移动的快慢的操作性定义?
制作好动力船后,我们可以根据船只在3秒内移动的距离来确定船只移动的快慢
把船只放入水里后,我们可以根据船只在3秒内移动的大小来确定船只移动的快慢
扭转螺旋桨后,我们可以根据船只在3秒内移动的面积来确定船只移动的快慢
扭转螺旋桨并把船只放入水里后,我们可以根据船只在3秒内移动的距离来确定船只移动的快慢
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