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Developing a strong testable hypothesis has few advantages, it compels us to think intensely and specifically about the outcomes of a study.
Therefore, you need to be careful and thorough when building your hypothesis.
A minor flaw in the construction of your hypothesis could have an adverse effect on your experiment.
If I replace the battery in my car, then my car will get better gas mileage. If I eat more vegetables, then I will lose weight faster. If I add fertilizer to my garden, then my plants will grow faster. If I brush my teeth every day, then I will not develop cavities. If I take my vitamins every day, then I will not feel tired. If 50 m L of water are added to my plants each day and they grow, then adding 100 m L of water each day will make them grow even more.
Following the scientific method, we come up with a question that we want to answer, we do some initial research, and then before we set out to answer the question by performing an experiment and observing what happens, we first clearly identify what we "think" will happen.
What are your experiences with building hypotheses for scientific experiments?
A hypothesis has classical been referred to as an educated guess.
This formulaic approach to making a statement about what you "think" will happen is the basis of most science fair projects and much scientific exploration.
We make an "educated guess." We write a hypothesis. What you "think" will happen, of course, should be based on your preliminary research and your understanding of the science and scientific principles involved in your proposed experiment or study.
The greater number of coal plants in a region (independent variable) increases water pollution (dependent variable).
If you change the independent variable (building more coal factories), it will change the dependent variable (amount of water pollution).