How Fast or Far Can You Roll a Ball Day 2

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Presentation transcript:

9-25-17 How Fast or Far Can You Roll a Ball Day 2

Do Now: Copy down the underlined question and write your answer in your Science Notebook Alex and Jennifer conducted an experiment to test reaction times in grabbing a meter stick after it’s dropped. They each tested 15 friends. Alex dropped the meter stick for his friends and Jennifer dropped the meter stick for her friends while the other one timed the reactions. Jennifer’s friends reacted, on average 0.9 seconds faster than Alex’s friends. Jennifer concluded that her friends were faster. Which of the following should she do next to check her results? A. Try a different reaction time experiment B. Try the experiment again, this time using a ruler instead of a meter stick C. Repeat the experiment as it was done the first time but using only Jennifer’s friends D. Repeat the experiment and have one person drop the meter stick and the other take record the times for all the friends tested.

Do Now: Copy down the underlined question and write your answer in your Science Notebook Alex and Jennifer conducted an experiment to test reaction times in grabbing a meter stick after it’s dropped. They each tested 15 friends. Alex dropped the meter stick for his friends and Jennifer dropped the meter stick for her friends while the other one timed the reactions. Jennifer’s friends reacted, on average 0.9 seconds faster than Alex’s friends. Jennifer concluded that her friends were faster. Which of the following should she do next to check her results? A. Try a different reaction time experiment B. Try the experiment again, this time using a ruler instead of a meter stick C. Repeat the experiment as it was done the first time but using only Jennifer’s friends D. Repeat the experiment and have one person drop the meter stick and the other take record the times for all the friends tested. CORRECT

Today’s Homework: Repetition and Replication Worksheet on front counter Turn in Repetition vs. Replication worksheet Homework from Friday

HW Review: Trade & Grade using only red ink D. Investigation 4 C. Replication A. Scenario 1

How Fast or Far Can You Roll a Ball – Day 2 Today, you will be able to test your procedure and collect data. You should use your duplicate data table to record data (not the one on the back of your materials & procedure). The data table attached to their materials and procedures should not get filled in. Any information from their experiment, such as changes to materials, procedure and data table should be noted. You will turn in the data table filled out with their data.