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Agenda. Warm Up Scientific Method PPT Show Redi illustration Scientific Method Flow Chart Scientific Method Controls and variables worksheet. The Scientific Method. A series of steps used to solve problems. The Scientific Method. Identify the problem. Make observations

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Agenda

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  1. Agenda Warm Up Scientific Method PPT Show Rediillustration Scientific Method Flow Chart Scientific Method Controls and variables worksheet

  2. The Scientific Method A series of steps used to solve problems

  3. The Scientific Method • Identify the problem. • Make observations • Leads to a question: How do new living things, or organisms, come into being? Yummy Maggots!

  4. The Scientific Method 2. Form a hypothesis - Predict the answer to your question / problem - Redi’s Hypothesis:Flies producemaggots They thought maggots came from rotten meat

  5. The Scientific Method 3. Perform an experiment - Where only one variable is changed at a time Wire Gauze Tightly Sealed: Maggotsdo not appear Gauze Sealed: A few maggots appear Open: MaggotsDon’t Appear Wire Gauze

  6. Types of data (information) • Variables • what you measure in an experiment • dependent variable • measured variable • unpredictable change: we don’t know how it will change until we do the experiment • independent variable • manipulated variable • predictable change: it only changes because we chose how it would change • Constants • A variable that cannot change during an experiment The effect of _____________on _____________ INDEPENDENT DEPENDENT

  7. The Scientific Method 4. Record and Analyze results - Make notes of the results and your analysis • Independent • Variables: • Use of Gauze or Cap • Dependent • Variables: • Whether Maggots • appear or not • Constant • Variables: • Flasks, meat, location, temp Tightly Sealed: Maggotsdo not appear Gauze Sealed: A few maggots appear Open: MaggotsDon’t Appear

  8. The Scientific Method 5. Draw a conclusion - Was the hypothesis supported or refuted? - Redi concluded that maggots come from flies Tightly Sealed: Maggotsdo not appear Gauze Sealed: A few maggots appear Open: MaggotsDon’t Appear

  9. The Scientific Method 6. Communicate the results - Be prepared for questions Tightly Sealed: Maggotsdo not appear Gauze Sealed: A few maggots appear Open: MaggotsDon’t Appear

  10. Any Questions??

  11. Scientific Method Video

  12. Graphing Your Data Showing patterns & trends A picture is worth a thousand words!

  13. Types of data (information) • Variables • what you measure in an experiment • dependent variable • measured variable • unpredictable change: we don’t know how it will change until we do the experiment • Y-axis • independent variable • manipulated variable • predictable change: it only changes because we chose how it would change • X-axis The effect of _____________on _____________ INDEPENDENT DEPENDENT

  14. Examples of experiments 1 • How does fertilizer affect the growth rate of plants? • we set up an experiment testing different amounts of fertilizer on different plants & measuring the growth (height) of the plants: • dependent variable (Y-axis)? • height of plants • independent variable (X-axis)? • amount of fertilizer The effect of _____________on _____________ Amount of Fertilizer Height of Plants

  15. Examples of experiments 2 • How does exercise affect heart rate of 10th grade student? • we set up an experiment testing different lengths of time of exercise (minutes) on the heart rate of students: • dependent variable (Y-axis)? • heart rate • independent variable (X-axis)? • minutes of exercise The effect of _____________on _____________ Exercise Heart Rate

  16. Examples of experiments 3 • What’s the favorite drink of students? • we set up an experiment surveying students and asking which is their favorite drink : • dependent variable (Y-axis)? • number of students • independent variable (X-axis)? • type of drink The effect of _____________on _____________ Type of Drink How many students chose it

  17. Making pictures out of data How’s a critterto choose? • Graphs • line graphs • graphing data that shows continuous change • bar graphs (or histograms) • graphing data that is in disconnected groups

  18. 10 20 30 15 25 0 5 0 1500 1000 2500 2000 500 1200 How does elevation affect temperature? Line graph! 18 temperature 1200 ft? elevation

  19. 0 2 4 6 1 3 5 Gatorade water Pepsi Coke tea Which drink do you like best? Bar graph! number of students Red Bull? RB RB type of drink

  20. Any Questions??

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