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?

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).

Does Practice Make Perfect?

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

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.

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

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

Number reached in 1 minute Data Chart Trial # Number reached in 1 minute 1st 2nd 3rd 4th 5th

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.

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

Graph Trial number 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

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

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 time Time to reach 100: ___________

With Distraction