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scientific method G5

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- 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
- 9. After you made your research, Can you guess an answer to your question?
- 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 In tables, graphs. Dull coin After 5 min. in the lemon juice Shiny
- 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. Example 3: 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. You decide the ages of the students, so: Different ages of the students is the independent variable.
- 22. Example 4: The higher the temperature of water, the faster an egg will boil. You decide the temperature of water, so: Different temperatures of water is the independent variable.
- 23. Example 5: The temperature of water was measured at different depths of a pond. You decide the depth of water, so: Depth of water is the independent variable.
- 24. Dependent (outcome) variable 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.
- 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. Example 3: 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. You measured time, so: Time taken to finish the puzzle is the dependent variable.
- 27. Example 4: The higher the temperature of water, the faster an egg will boil. You measure the time the egg takes to boil, so: Time is the dependent variable.
- 28. Example 5: The temperature of water was measured at different depths of a pond. You measure the temperature, so: Temperature is the dependent variable.

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