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# Scientific method(am.)

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### Transcript

• 1. The Scientific Method involves a series of steps that are used to find an answer to a problem.
• 2. Do you remember the steps of the scientific method?
• 3. 1)Observation AH—Look at this! Observe a problem or anything around you
• 4. Example:
• 5. Observe the 2 pennies in front of you. Record your observation. Observation Penny 1 Penny 2 Color Dull Shiny
• 6. 2) Question Develop a question or problem that can be solved through an experiment. Q) Will lemon juice clean the dull coin?
• 7. 3) Research
• 8. After you search the internet and the books for information you find out that: Lemon, vinegar and tomato sauce can be use to clean silver and metal objects
• 10. 3) Hypothesis An educated guess. Lemon juice can be used to clean the dull coin.
• 11. NOW, lets test whether our hypothesis is right or wrong.
• 12. 4) Experiment Make a test to test whether the hypothesis is correct. 1)Put the coin in the lemon juice. 2) Wait for 5 min. and record the results.
• 13. 5) Record results Dull coin After 5 min. in the lemon juice Shiny In tables, graphs.
• 14. 6) Conclusion The answer to the question (you state whether your hypothesis was right or wrong).. The lemon juice cleans the dull coin.
• 15. Any experiment has Variables
• 16. WHAT ARE Variables?
• 17. Variables Variables are things that vary and change
• 18. In any experiment there are 3 variables: Independent variables Dependent variables Controlled variables Let’s look at each type….
• 19. Independent (input) variable This is the thing that you decide to change. Example 1: Investigating how a weight affects the length of an elastic band. You decide the weight to put, so: Weight is the independent variable.
• 20. Example 2: Investigating how the rate of cooling of a beaker depends on the initial temperature. You decide the initial temperature, so: initial temperature is the independent variable.
• 21. Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle. Example 3: You decide the ages of the students, so: Different ages of the students is the independent variable.
• 22. The higher the temperature of water, the faster an egg will boil. Example 4: You decide the temperature of water, so: Different temperatures of water is the independent variable.
• 23. The temperature of water was measured at different depths of a pond. Example 5: You decide the depth of water, so: Depth of water is the independent variable.
• 24. This is the variable that changes as a result. It is the variable that you measure. Example 1: Investigating how a weight affects the length of an elastic band. You measure the resulting length of the elastic band, so: Length is the dependent variable. Dependent (outcome) variable
• 25. Example 2: Investigating how the rate of cooling of a beaker depends on the initial temperature. You measure the temperature every minute as it cools, so: temperature is the dependent variable.
• 26. Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle. Example 3: You measured time, so: Time taken to finish the puzzle is the dependent variable.
• 27. The higher the temperature of water, the faster an egg will boil. Example 4: You measure the time the egg takes to boil, so: Time is the dependent variable.
• 28. The temperature of water was measured at different depths of a pond. Example 5: You measure the temperature, so: Temperature is the dependent variable.