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Scientific Method

Scientific Method. Scientific Method. 5 Steps to the Scientific Method Making Observations Asking a Question Forming a Hypothesis Performing an Experiment Analyzing Data & Forming Conclusions. Making Observations – STEP 1. Using your five senses to obtain information.

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Scientific Method

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  1. Scientific Method

  2. Scientific Method 5 Steps to the Scientific Method Making Observations Asking a Question Forming a Hypothesis Performing an Experiment Analyzing Data & Forming Conclusions

  3. Making Observations – STEP 1 Using your five senses to obtain information

  4. Asking a Question-STEP 2 Based on observations; one or more questions are generated

  5. Forming a Hypothesis – STEP 3 Hypothesis-A testable statement with collected evidence Written in the form of an “If-then” statement

  6. Performing an Experiment – STEP 4 Experiment-testing of a hypothesis or prediction

  7. Parts of a Science Experiment • Control group-group used as a comparison (does not change) • Independent variable-variable being tested • Dependent variable-variable that is measured • Constants-parts of the experiment that is the same for all test groups

  8. A student wanted to know if watering the plants with salt water and fertilizer will affect their growth. The student planted 5 seeds of the same plant in three different pots. For 5 days he watered plant 1 with watered, plant 2 with salt water and plant 3 with fertilizer. When the plants emerged from the top of the soil he measured and recorded the heights for each pot.

  9. Banana Experiment Write a hypothesis for this experiment If____________________________then________________________

  10. What is the control? (group used as a comparison) What arethe Independent variables? (variables being tested) What is the Dependent variable? (variable or data that is measured and collected) • Plants watered with water • Plants watered with salt water and fertilizer • Height of plants

  11. Analyzing Data & Forming a Conclusion – STEP 5 Collected and organized data are analyzed Conclusion is the process of determining whether data are reliable or whether they support or do not support a hypothesis or prediction

  12. Data Collected of TOTAL Growth over 5 days Does the DATA support your HYPOTHESIS? Why or why not?

  13. Forming a Conclusion – STEP 5 If data does not support hypothesis then steps would be taken to determine errors and/or redo experiment

  14. What are some errors that could have occurred during the experiment? (Hint…what are the parts to an experiment)

  15. How could the experiment be adjusted to collect accurate results?

  16. Scientific Peer Review Scientists must sharethe results of their studies with other scientists Allows scientists to build on the work of others Research subject to examination and verification by other scientists

  17. Theories Theory- a set of related hypotheses that have been tested and confirmed many times by many scientists Supported by considerable evidence

  18. MEASUREMENTS

  19. Measurements • We will be using SI units or metric system when possible --- the WHOLE world uses it except us (USA)

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