In a scientific experiment, a researcher wants to see how different temperatures affect the growth of a certain plant. What is one thing the researcher needs to keep the same in this experiment? A. 增这提关结员住和由增
A. dependent variable. B. independent variable. C. control variable. D. constant. 相关知识点: 试题来源: 解析 B。在科学实验中,被科学家改变的变量称为自变量。选项 A 因变量是随着自变量的变化而变化的;选项 C 控制变量是保持不变的;选项 D 常量也是不变的。反馈...
although few of us have been under true quarantine, which refers to isolating after a possible exposure to infection. Instead much of the world is living with restrictions that Bonanno suspects
Foxglove is a common plant. People have used it to make the heart slow down. Recently scientists have developed another drug from it. This new drug helps prevent other heart problems. In some areas, malaria has been a problem. Scientists have learned that the bark of a South American tree...
Choose one goal to start something large enough that will give you a sense of accomplishment,while adjusting well to your core values.Focus is key here.3If you perform many tasks at。a time,you might never complete your projects because they will take far too lon9. ...
In a scientific experiment, the independent variable is manipulated to observe its effect on the dependent variable.Which of the following is an example of an independent variable? A. The temperature of a reaction. B. The color of a solution. C. The time it takes for a reaction to occur....
make the experiment more fun C. ensure the results are reliable D. confuse the scientist 相关知识点: 试题来源: 解析 C。解析:在科学实验中,重复是重要的,以确保结果是可靠的。选项 A“waste time”错误。选项 B“make the experiment more fun”不是主要目的。选项 D“confuse the scientist”显然不对...
Instead, he learned that mistakes were just opportunities for learning something new, which is, after all, what scientific experiments are all about(真谛). Even if the experiment " doesn't work", we usually learn something valuable from it. 这位著名的科学家谈论道,正是在那一刻他明白了无需...
[题目]Below is a description of a single scientific experiment. It shows us how iron reacts with air and with water.Aim: To find out if iron rusts in water that has no air in it in ordinary water.Materials: Some clean iron nails ; test tubes; test tube h
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