thirdgraders have difficulty in focusing on task D. fourthgraders are more concentrated without a break E. 细节理解题。根据第四段的第三句“The kids' attentiveness decreased when they had to wait longer for F. reak, and refreshed themselves after they played.”可知,当孩子们不得不等待...
Fourth grade science students already know that magnets attract metal objects. In this experiment, they’ll measure to see how close a magnet needs to be to an object for the attraction to work. Mix things up withdifferent sizes of magnetsand objects of various weights. Learn more:Magnet Meas...
We havefun science activitiesfor toddler, preschool, pre-k, kindergarten, first grade, 2nd grade, 3rd grade, 4th graders, and up. From edible food experiments to simple diy lava lamps, color changing slime to growing crystals, rockets that take off with vinegar and baking soda power, and so...
High school science fair projects can be about more than agrade. Winning a high school science fair can net some nice cash prizes, scholarships, and college/career opportunities. While it's fine for an elementary or middle school project to take hours or a weekend to complete, most high scho...
thirdgraders have difficulty in focusing on task D. fourthgraders are more concentrated without a break 相关知识点: 试题来源: 解析 [答案]A [解析]细节理解题。根据第四段的第三句“The kids' attentiveness decreased when they had to wait longer for break, and refreshed themselves after ...