Identify a question that you would answer in a experiment. As you decide on a question or topic for your project, ask yourself:
- Can this question be answered by an experiment?
- Can I conduct the experiment with supplies that I have readily available to me?
Also, write down what kinds of treatments you can impose and the variables and factors you can control to answer your question. If you have a difficult time identifying variables for your question you may need to propose a different question for your project.
Write down your question or problem statement. Know some background information on your topic.
Based on the question asked give a hypothesis that can be tested. Give a summary of info you know about the question. Only the points that you think will help you answer the question or design an experiment.
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If the choice of experiment is up to you, you can choose any experiment. I will use the salt-sand separation experiment for answering your question.
Question: How much salt and sand is there in a given salt-sand mixture?
Hypothesis: Water solubility characteristics of salt and sand can be combined with boiling to separate a mixture of salt and sand.
Background Knowledge: Salt dissolves in the water, while sand does not. So sand can be separated from a sand-salt mixture dissolved in water by the process of filtration (using a filter paper). The salt can be collected by evaporating the water from the salt solution (after filtration).
Supplies needed: salt-sand mixture, water, glass beaker, glass rod (for mixing), Bunsen burner (or other arrangement for boiling water), filter paper, weighing balance.
Variables: amount of water, boiling temperature, extent of mixing, etc.
Hope this helps.
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