A logical method of problem solving Steps of the Scientific Method Making observations that lead to a question Forming a hypothesis to answer the question Testing the hypothesis ID: 284649
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Scientific Method
A logical method of problem solvingSteps of the Scientific MethodMaking observations that lead to a questionForming a hypothesis to answer the questionTesting the hypothesis by experimentMaking a conclusion based on the results of the experiment
Episode 101 Slide2
Definitions
Observing: Use of the senses and devices in the lab to obtain informationConclusion: A statement based on observations and prior knowledgeThe milk taste sour.The sour milk is spoiled.The temperature of the liquid is 33°C.The wire is made of copper because of its copper color and it conducts electricity.It is about to rain because the sky is dark.When the powder was added to water, it fizzed.
The gas blown on the candle was CO
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because the candle went out.Lemon juice is an acid and taste sour. All acids must taste sour.
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Episode 101 Slide3
Observations
Quantitative Includes numbers and unitsQualitative Does not include numbers and unitsDepends on sensesCandle is white.It is shaped like a cylinder.The candle is 2.1 cm in diameter.The candle material smells like wax.The candle material is soft enough to be scratched by a fingernail.The candle is lit by holding a flame close to the wick.The flame is about 2 cm tall and 1 cm wide.
After the flame goes out, the liquid solidifies after 5 seconds.
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Episode 101 Slide4
Hypothesis
An educated guessA good hypothesis:Explains an observationCan be testedWill predict an outcomePractice forming a hypothesis:What is the purpose of the candles wick?As the candle burns, it gets shorter. Where does the wax go?Episode 101 Slide5
Experiment
Is designed to test a hypothesisInvolves variablesFactors that can be varied or changedIs performed under controlled conditionsControl: a variable that is held constantEpisode 101 Slide6
In a good experiment:
Only two variables are allowed to changeThe manipulated (or independent) variable is changed by the scientistThe responding (or dependent) variable changes as a result of the experimentAll other variables are controls because they are held constant
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Episode 101 Slide7
Design an experiment to test your hypothesis concerning the candle.
Develop a conclusion from the data and observations made in the experiment.Episode 101