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Scientific Method

A series of planned steps used to answer questions and solve problems in a science experiment or project. Includes the 8 steps of the scientific method and how to apply them.

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Scientific Method

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  1. Scientific Method Class Experiment/Mini Board Project Notes Berrios-Chacon 8th Grade Science 2015-2016

  2. Scientific Method A series of planned steps used to answer questions and to solve problems • Used in any science experiment or project. • Used everyday since you were born.

  3. Question Observation Inference Hypothesis Experiment Results Analysis Conclusion Queens Offer Indians Help Eating Raspberries And Cherries 8 Steps of the Scientific Method

  4. Scientific Method Question Observation Inference Hypothesis Experiment Results Analysis Conclusion What do you want to know? Use 5 senses (6 senses for girls) Prior knowledge If/then/because statement Test/Procedures Data Organize data (graph) What did you find out?

  5. Question Does the amount of Alka Sletzer affect the time it takes to react?

  6. Observation… • Alka Seltzer is white in color • Smooth texture • Powdery surface • Circular Shape • Brittle • Fildcannnister is plastic/smooth texture • Cylinder in shape • Transparent • Has Removalbe lid Inference…. • Alka Seltzer is used to medicate stomach problems • Dissolves in water • Alka Seltzer cause chemical reaction • Even the smallest amount of Alka Seltzer can cause a chemical reactino.

  7. Hypothesis If the amount of Alka Selzter is increased, then the reaction time will decrease because very small amounts of Ala Selzter causes a chemical reaction.

  8. Materials • Alka Seltzer • ¼ Tablet • ½ Tablet • 1 whole Tablet • 1 cup of water • 3 Plastic film cannisters • Stop Watch • Journal • Pencil

  9. Experiment Control -A standard for comparison in an experiment. -all the components that are kept the same. Variable A changeable factor in a controlled investigation. -Only one variable should be tested at a time during an experiment!

  10. 2 Types of Variables • Independent Variables -the variable we change 2. Dependent Variables -the thing being measured

  11. Identify Variables Independent: (What are we changing/testing?) The amount of Alka Selzter Dependent: (what are we measuring?) The reaction time ( The time it takes to explode)

  12. Controls for ExperimentThe things that MUST remain the same for your experiment to be valid • Amount and Temperature of Water 2. Size of canisters 3. Brand of Alka Seltzer 4. Location 5. Environmental Factors

  13. Experiment/Procedures 1. Pour water into canister half full. 2. Place canister on flat surface. 3. Carefully drop ¼ tablet inside canister, quickly close lid, stand back, start timer. 4. Observe 5. Take final time when canister pops. 6. Record results 7. Repeat steps 1-6 for all other tablet amounts

  14. Time to go blow stuff up!!.....Because it’s Science!

  15. Results

  16. Making Graphs -Use a straight edge -Title the Graph -Include values of pie slices or bars -Color -Label your axis.

  17. DRY/MIX D ependent R esults Y -axis I M X ndependent odify -axis

  18. Analysis/Graph 20 18 Seconds BOOM!! 15 10 Time (Seconds) 7 Seconds 5 4 Seconds 1 Tablet ¼ Tablet ½ Tablet Amount of Alka Seltzer

  19. ConclusionParagraph Form3rd person • What does the data tell us? • Was the hypothesis correct? • Were any mistakes made? • How could we change the experiment in the future? • What was learned from this experiment? • How can we apply this to real life?

  20. Conclusion (Paragraph Form) • After running the experiment, it was evident that as the amount of Alka Seltzer increased, there was a decrease in reaction time. • The hypothesis was correct. The whole Alka seltzer had the fastest reaction time. • There were no errors in the experiment. • In the future, the scientist will add more trials, test more amounts, and may also change the independent variable to water. • This experiment would be beneficial in medicine and help create public awareness about the increased effects and possible rapid treatment of stomach problems in people.

  21. Introduction Checklist • Written in paragraph form • 3rd Person • Question • Observations • Inferences • Hypothesis • Independent Variable • Dependent Variable • Research

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