Carefully read the following information about experimental design. When scientists conduct an experiment, they change one factor on purpose. The factor that is changed on purpose is called the independent variable. They perform a test to see if some other factor will change as a result. The factor that might change as a result is called the dependent variable. They also keep many other factors the same on purpose so that they don't impact the results. The factors that are kept the same on purpose are called controlled factors. 1. Think about the various factors shown in the experiment in the video. For each factor, determine whether the factor was the independent variable (changed on purpose), the dependent variable (might have changed as a result of the experiment), or a controlled factor (kept the same on purpose). This question is only worth one point. You must get all four choices correct in order to earn the point. (1 point) independent variable (changed on purpose) dependent variable (might have changed in response) controlled factor (kept the same on purpose) approximate amount of soil in each bottle amount of soil washed out of each bottle approximate amount of water poured onto each sample type of erosion protection on each soil sample Question 2 Think about the results of the experiment. Which type of soil protection provided the most erosion control?
The type of erosion protection on each soil sample is the independent variable (changed on purpose). The amount of soil washed out of each bottle is the dependent variable (might have changed as a result of the experiment). The approximate amount of soil in each bottle and the amount of water poured onto each sample are controlled factors (kept the same on purpose).
Based on the results of the experiment, it can be concluded that the type of erosion protection using grass provided the most erosion control.