The scientific method:  To understand a given phenomenon.

 

 

The scientific method:  To understand a given phenomenon.

Steps in scientific method

1- Making observation

  1. Qualitative : no numbers

Example: The sky is blue and water is liquid

  1. Quantitative (called measurement): number+ unit Example: Water boils at 100 °C

2- Formulating hypothesis

Hypothesis is a possible explanation for an observation

3- Performing experiments to test hypothesis:

To gather new information that enable a scientist to decide whether the hypothesis is valid.

Theory (Model): Is asset of tested hypothesis that gives overall explanation of some natural phenomenon.

Observation versus theory

Observation: something that is witnessed.

Theory: interpretation (a possible explanation of why nature behaves in particular way).

Natural law versus theory

Natural law: is a summary of observed (measurable) behaviours (example: law of conservation of mass).

Theory: explanation of behaviour.

 

 

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