controlled variable

简明释义

被控变量

英英释义

例句

1.To isolate the effect of light on photosynthesis, researchers kept the carbon dioxide level as a controlled variable 控制变量.

为了隔离光对光合作用的影响，研究人员将二氧化碳水平保持为一个控制变量 控制变量。

2.In an educational study, the curriculum was a controlled variable 控制变量 to assess teaching methods.

在一项教育研究中，课程是一个控制变量 控制变量，用于评估教学方法。

3.In a clinical trial, patient age is often a controlled variable 控制变量 to minimize bias.

在临床试验中，患者年龄通常是一个控制变量 控制变量，以最小化偏差。

4.When testing the effects of different fertilizers on plant growth, soil type must be a controlled variable 控制变量.

在测试不同肥料对植物生长的影响时，土壤类型必须是一个控制变量 控制变量。

5.In a scientific experiment, temperature is often a controlled variable 控制变量 to ensure accurate results.

在科学实验中，温度通常是一个控制变量 控制变量，以确保结果的准确性。

作文

In scientific experiments, it is crucial to understand the role of different types of variables. Among these, the concept of a controlled variable is particularly important. A controlled variable is any factor that is kept constant throughout an experiment to ensure that the results are valid and reliable. By controlling certain variables, researchers can isolate the effects of the independent variable on the dependent variable, allowing for clearer conclusions to be drawn from the data collected.For instance, consider an experiment designed to test the effect of sunlight on plant growth. In this scenario, the independent variable would be the amount of sunlight each group of plants receives, while the dependent variable would be the growth of the plants, measured in height or biomass. To ensure that the experiment is fair and that any changes in plant growth can be attributed solely to the sunlight, several controlled variables must be maintained. These could include the type of plant used, the amount of water each plant receives, the type of soil, and even the temperature of the environment.By keeping these controlled variables constant, the researcher can confidently assert that any differences observed in plant growth are due to the variations in sunlight exposure. This is vital for the integrity of the experiment, as uncontrolled variables could introduce bias or confounding factors that might skew the results.Moreover, understanding controlled variables is not only essential in laboratory settings but also in real-world applications. For example, in clinical trials for new medications, researchers must control various factors such as age, weight, and pre-existing health conditions of participants. If these variables are not controlled, it becomes difficult to ascertain whether the medication itself is effective or if the observed effects are due to other factors.In conclusion, the use of controlled variables is fundamental to the scientific method. They serve as the backbone of experimental design, ensuring that researchers can draw accurate conclusions from their studies. Without proper control of these variables, the reliability of the results would be compromised, leading to potential misinterpretations and flawed scientific understanding. Thus, mastering the concept of controlled variables is essential for anyone involved in scientific research or experimentation, as it lays the groundwork for credible and reproducible findings.

在科学实验中，理解不同类型变量的作用至关重要。在这些变量中，控制变量的概念尤其重要。控制变量是指在实验过程中保持不变的任何因素，以确保结果的有效性和可靠性。通过控制某些变量，研究人员可以将自变量对因变量的影响隔离开来，从而使收集的数据得出更清晰的结论。例如，考虑一个旨在测试阳光对植物生长影响的实验。在这种情况下，自变量将是每组植物接受的阳光量，而因变量则是植物的生长，可以通过高度或生物量来测量。为了确保实验的公平性，并使植物生长的任何变化都能归因于阳光，必须保持几个控制变量不变。这些变量可能包括所使用的植物类型、每株植物获得的水量、土壤类型，甚至环境温度。通过保持这些控制变量不变，研究人员可以自信地断言观察到的植物生长差异是由于阳光照射的变化。这对于实验的完整性至关重要，因为不受控制的变量可能会引入偏差或混杂因素，从而扭曲结果。此外，理解控制变量不仅在实验室设置中至关重要，而且在现实应用中也同样适用。例如，在新药物的临床试验中，研究人员必须控制参与者的多个因素，例如年龄、体重和既往健康状况。如果这些变量没有得到控制，就很难确定药物本身是否有效，或者观察到的效果是否由于其他因素造成。总之，使用控制变量是科学方法的基础。它们作为实验设计的支柱，确保研究人员能够从他们的研究中得出准确的结论。如果不正确控制这些变量，结果的可靠性将受到损害，从而导致潜在的误解和错误的科学理解。因此，掌握控制变量的概念对于任何参与科学研究或实验的人来说都是必不可少的，因为它为可信和可重复的研究成果奠定了基础。