QUESTIONS IN SCIENCE
People look for three kinds of explanations about the way the world works: What? Why? How? The scientific method looks for data: objective observations and often quantified (based on measurements). Scientists are curious people who ask a lot of questions about the world around them and then find the answers. The scientific method is the way scientists go from
asking a question to finding an answer. It is the tool that scientists use to find the answers to questions. It is the process of thinking through the possible solutions to a problem and testing each possibility to find the best solution.

STEPS IN SCIENTIFIC METHOD
The scientific method involves the following steps: doing research, identifying the problem, stating a hypothesis, conducting projects experimentation, and reaching a conclusion. The order is always the same:
1. Observe the situation
2. Define the problem
3. Make a supposition (hypothesis)
4. Design an experiment (test the hypothesis)
5. Formulate a theory

RESEARCH
Research is the process of collecting information from experiences, sources, and data. The problem is the scientific question to be solved. It is best expressed as a question, a question that is answered with a statement, not just a yes or a no. A hypothesis is an idea about the solution to a problem, based on knowledge and research. What is the difference between a fact, a theory and a hypothesis? In popular usage, a theory is just a vague kind of fact and a hypothesis is often used as a synonym to `guess'. To a scientist a theory explains existing observations and predicts new ones.
TESTING VARIABLES
Project experimentation is the process of testing a hypothesis. The things that have an effect on the experiment are called variables. There are three kinds of variables that you need to identify in your experiments: independent, dependent, and controlled.
The independent variable is the variable you purposely manipulate (change). The dependent variable is the variable that is being observed, which changes in response to the independent variable. The variables that are not changed are called controlled variables.