step 1 greetings and lead－in
greet the whole class as usual.
t: we are going to do an experiment today. i need these things to do the experiment: test tubes, bunsen burner, salt...when we do an experiment, we should first of all have an aim. we should use proper methods. we should find the result and draw a conclusion.
have you ever done a scientific experiment? what is the correct order of a scientific experiment?
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