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Steps of the Scientific Method
Making observations that lead to a question.
Forming a hypothesis to answer the question.
Testing the hypothesis by experiments.
Making a conclusion based on the results of the experiment.
Observing is the use of the and senses and devices in the lab to obtain information.
A conclusion is a statement based on observations and prior knowledge.
A hypothesis is an educated guess.
A good hypothesis explains an observation, can be tested, and will predict the outcome of an experiment.
Practice forming a hypothesis:
1. What is the purpose of the candle’s wick?
2. As the candle burns, it gets shorter. Where does the wax go?
An experiment is designed to test a hypothesis, involves variables, and is performed under controlled conditions.
Variables are factors that can be changed.
A control is a variable that is held constant.
In a good experiment, only two variables are allowed to be changed-the manipulated (or independent) variable is changed by the scientist, and the responding (or dependent) variable changes as a result of the experiment. All other variables are controls because they are held constant.
Quantitative includes numbers and units.
Qualitative does not include numbers.