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The experiment is the foundation of the scientific method , which is a systematic means of exploring the world around you
. Although some experiments take place in laboratories, you could perform an experiment anywhere, at any time
Types of Experiments
Natural Experiments
A natural experiment also is called a quasi-experiment. A natural experiment involves making a prediction or forming a hypothesis and then gathering data by observing a system. The variables are not controlled in a natural experiment
Controlled Experiments
Lab experiments are controlled experiments, although you can perform a controlled experiment outside of a lab setting! In a controlled experiment, you compare an experimental group with a control group. Ideally, these two groups are identical except for one variable, the independent variable.
Field Experiments
A field experiment may be either a natural experiment or a controlled experiment. It takes place in a real-world setting, rather than under lab conditions. For example, an experiment involving an animal in its natural habitat would be a field experiment.
Scientific Method Steps
The exact number of steps to the scientific method depends on how you break up the steps, but here is an overview of the basics
Make observations
Propose a hypothesis.
Design and perform an experiment to test the hypothesis.
Analyze your data to determine whether to accept or reject the hypothesis.
If necessary, propose and test a new hypothesis.