In an experiment, the factors that can change are called variables. The correct answer is B. One variable should change and the others should be kept the same.
When conducting an experiment, it is important to have a controlled environment. This means that all variables, except for the one being tested, should be kept constant. By changing only one variable, scientists can observe the effect that it has on the outcome of the experiment.
For example, let's say you want to investigate the effect of temperature on the rate of plant growth. In this experiment, you would keep all other factors, such as light, water, and soil type, constant. You would then vary the temperature and measure the growth of the plants. By changing only the temperature, you can determine its specific impact on the rate of plant growth.
By controlling the variables in an experiment, scientists can confidently attribute any changes observed in the outcome to the specific variable being tested. This allows for accurate and reliable results.
Therefore, in an experiment, one variable should change while the others are kept the same (option B).
B. One variable should change, and the others should be kept the same. In an experiment, it is important to only change one variable at a time while keeping all other variables constant. This allows researchers to observe the specific effects of that one variable on the results. Changing multiple variables at once can make it difficult to determine which variable is responsible for any observed changes.
In an experiment, variables are the factors that can potentially affect the outcome or results. The answer B states that in an experiment, one variable should change, while the others should be kept the same.
This is important because in order to understand the relationship between variables, it's necessary to isolate the effects of one specific variable at a time. By changing only one variable, called the independent variable, while keeping all other variables constant, we can observe how that one variable affects the outcome, known as the dependent variable.
For example, let's say you are conducting an experiment to investigate the effect of temperature on the rate of plant growth. You would keep factors such as soil type, amount of water, and light intensity constant. The only variable you would change is the temperature. By varying the temperature and observing the growth of the plants, you can determine the impact of temperature on plant growth.
This approach helps to establish a cause-and-effect relationship between the independent variable and the dependent variable. If multiple variables were changed simultaneously, it would be difficult to determine which variable was responsible for the observed changes in the outcome. Therefore, changing one variable at a time and keeping others constant allows for a clearer understanding of the relationship between variables in an experiment.