Scientists use the scientific method to try to solve a problem or answer a question. Once a question has been established, one looks at what is known about this particular problem or question through research, observation, etc. Then, one attempts to answer the problem or question which is called the hypothesis. It is an educated guess based on prior research and observation. A hypothesis comes from the person who is trying to answer a question. The next logical step is to test this hypothesis in a controlled experiment. Ideally, the experimental group should be large and only one variable should be tested. The control group will not receive this variable and a comparison will be made between the two groups. Data will be analyzed and a conclusion will be made. Was the hypothesis correct or not? The results are then shared with the scientific community.