Scientific Investigation in Chemistry

 
1.2  Scientific Investigation in Chemistry
 
 

Scientific Method

Making observation

Using senses of sight, hearing, touch, taste or smell to gather information about an object or a  phenomenon taking place.

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Making inference

Using data collection and past experience to make a conclusion and explanation about an event.

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Identifying the problem

Asking questions based on the inference made.

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Making a hypothesis

Making a general statement about the relationship between a manipulated variable and a responding variable to explain an event or observation. This statement can be tested to prove its validity.

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Identifying the variables

Identifying the; 

  • Manipulated variable
  • Responding variable
  • Fixed variable(s)
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Controlling the variables

In an investigation, a variable is manipulated to observe its relationship with the responding variable. Simultaneously, other variables are fixed.

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Planning an experiment

The matters that need to be identified in an experiment;

  • Materials
  • Apparatus
  • The procedure of the experiment 
  • Method of collecting data
  • Ways to analyse and interpret the data
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Collecting data

Making observations or measurements and recording the data systematically.

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Interpreting data

Organising and interpreting the data collected. Data can be interpreted through 

  • calculations
  • graphs
  • charts
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Making a conclusion

Making a statement on the results of the experiment on whether the hypothesis made is accepted or rejected.

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Preparing a report

The results of the investigation can be shared for the development of chemistry.