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Walk In…

Explore why it is crucial for scientists to form a hypothesis before conducting experiments and discover the impact of practice on performance using a number chart task.

jduvall
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Walk In…

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  1. Walk In… • Take out notebook • At the back of notebook, write today’s date, and answer the question in complete sentences: • Why is it important to make a hypothesis (prediction) before doing an experiment?

  2. Possible Answers • Scientists make a hypothesis or educated guess so they know what they are trying to find out. • By the end of the experiment, they realize their hypothesis was either SUPPORTED or NOT SUPPORTED (not right or wrong).

  3. Does Practice Make Perfect?

  4. The old saying is… • Practice makes perfect • What do you think that means? • What things have you practiced that you have improved on?

  5. Practice Makes Perfect • Purpose: Does doing a task over and over improve your ability to perform the task? • In today’s lab, you will be provided a number chart with numbers 1-80 on them but mixed up. You will have to point to the numbers in order. Your goal is to get to the highest number in 1 minute. • You will repeat the experiment 5 times. • The goal of the experiment is to investigate how practice affects performance.

  6. Hypothesis • Hypothesis: • If I repeat the same task 5 times, then my results will (improve, stay the same, or decline) each time because ______.

  7. Variables • Independent Variable (what we change): • amount of practice • Dependent Variable (what we measure): • The highest number reached in one minute

  8. Data Chart

  9. Procedure • Keep the Number Chart face down. • At the teacher’s signal, turn the Number Chart over. • Place your finger on #1, the #2, and so on until time is called (1 minute). • Keep your finger on the last number you reached when the timer went off. • Record the number in your data chart.

  10. Online Timer • Ready to count? Wait until you are told to turn your paper over!

  11. Graph • X-axis (bottom) – Trial number (1, 2, 3, 4, 5) • Y-axis (side) – Highest number counted • Highest number 1 2 3 4 5 • Trial number

  12. Conclusion • Was your hypothesis supported? Why or why not? Use data from your chart to answer this question.

  13. For Fun • See how a distraction affects your results. • Record your time.Number reached with distraction: __________ • Set the time to count up. • Find all the numbers from 1-100. • Record your timeTime to reach 100: ___________

  14. With Distraction

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