What is a hypothesis
What is a hypothesis
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A hypothesis is a testable scientific statement that predicts what will happen in an experiment and why it will happen. It is not a guess; it is a prediction based on scientific knowledge and reasoning.
A good hypothesis:
Explains a cause-and-effect relationship
Can be tested through an experiment
Can be proven true or false
Uses measurable variables
Importance of a Testable Hypothesis
Importance of a Testable Hypothesis
To consider a hypothesis as testable, some essential criteria must be met:
There must be a possibility to prove that the hypothesis is true.
There must be a possibility to prove that the hypothesis is false.
The results of the hypothesis must be reproducible by repeating the experiment under the same conditions.
These criteria are extremely important. Without them, the research process may become vague, poorly structured, and lack clear scientific objectives (Helmenstine A., 2020).
It is important to note that a key scientific practice is to design experiments that attempt to prove the hypothesis wrong. Trying only to prove a hypothesis right can lead to biased results and weak scientific conclusions.
Writing a Testable Hypothesis
Writing a Testable Hypothesis
Your hypothesis must be written using an if–then statement, following this format:
If (a specific and measurable action is taken),
then (a specific and measurable outcome is expected).
Make sure that:
The if part includes a measurable independent variable
The then part includes a measurable dependent variable
Both variables are realistic and reachable within your experiment
Scientific Reasoning
Scientific Reasoning
After writing the if–then statement, you must explain why you expect this result.
This explanation should be based on scientific knowledge, not opinions or guesses.
You may write this by completing the following sentence:
This will happen because it has been proven that…
This part of the hypothesis should include scientific concepts from chemistry, such as particle theory, collision theory, acidity, concentration, or reaction rates, depending on your investigation.
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