EVERYDAY SCIENCE

Detailed explanation-1: -Expert-Verified Answer. In this investigation, the independent variable is represented by the different liquids (Option C). The independent variable is the variable that isn’t changed by the other variables during the experimental procedure.

Detailed explanation-2: -When you try to grow plants using another liquid, the molecules (or what makes up that liquid) are shaped differently from water molecules. Because of their different shape, they block the process of photosynthesis from occurring, so the seeds do not know they should grow!

Detailed explanation-3: -In this experiment, the addition of fertilizer is the independent variable manipulated by the scientist. Plant height is the dependent variable that responds to the change in the independent variable. Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable.

Detailed explanation-4: -As we saw earlier in the book, an experiment is a type of study designed specifically to answer the question of whether there is a causal relationship between two variables. In other words, whether changes in an independent variable cause changes in a dependent variable.

Detailed explanation-5: -A controlled variable is a variable that doesn’t change during the experiment.