The Scientific Method.

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Presentation transcript:

The Scientific Method

General Information: Scientific Method: The process that is used to find out about the world and to answer questions - Scientists have a problem - They perform an experiment to try to solve it.

General Information: Hypothesis: an idea or explanation that is then tested through experimentation Theory: Explanations supported by experiments Variable: Something in an experiment that can change

General Information: Independent Variable: A variable that is changed Dependent Variable: What is being measured Constants: Variables that stay the same

General Information: Frequency : The number of items occurring in a given category Percent: A proportion multiplied by 100 Percent = # of red candies total candies

The steps of the scientific method: Make an Observation Ask a Question Research Form a Hypothesis Experiment Analyze Data Draw a Conclusion Share Results Orange Quiet Ratchet Hippos Eat Dirty Carrots Regularly

Identify the problem: Observation: What do you want to know or explain? Write a question that addresses the problem or topic

Gather the information: Research your topic via multiple sources Form a hypothesis (an educated guess)

What is a hypothesis? It is a prediction based on observations and your knowledge of the topic.

Form a hypothesis: What do you think will happen? Use prior knowledge Predict an answer or outcome

Perform an experiment: How will you test your hypothesis? Develop a reliable experiment and address safety rules Follow a step-by-step to perform your experiment

What is data? Record data and observations! It is information gathered during an experiment.

Analyze data: Is the data reliable? Does your data and observation support your hypothesis? You can determine if it is reliable by creating a graph that is easy to understand.

If yes – communicate the results: Write a conclusion that summarizes the important parts of your experiment and the results It is extremely important to share or communicate your results if they are accurate.

If the data is inaccurate: Is your data inaccurate or is the experiment flawed? Modify the experiment in some way Rewrite your procedure to address the flaws

Examples: Car Trouble Dogs with Fleas -Your car wouldn’t start -There is something wrong (battery, alternator, gas) -Turn on headlights, check spark plugs, dip stick in gas tank -Headlights work, strong ignition spark, no gas on dip stick but gauge reads half full Dogs with Fleas -Dogs boarded at the vet get fleas -But, the boarded dogs with King’s flea collars have fewer fleas IV? DV? Constants?