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Task with Student Directions
Contributed by: Third International Math and Science Study (TIMSS)

Task: At this station, you will find out how your pulse changes when you climb up and down on a step for 5 minutes.

At this station you should have:

  • A watch with a second hand
  • A step on the floor to climb on

Read ALL directions carefully.

This is what you should do:

  • Find your pulse and be sure you know how to count it. IF YOU CANNOT FIND YOUR PULSE ASK A TEACHER FOR HELP.
  • Decide how often you will take measurements starting from when you are at rest.
  • Climb the steps for about 5 minutes and measure your pulse at regular intervals.
  1. Make a table and write down the times at which you measured your pulse and the measurements you made.

  2. How did your pulse change during this exercise?

  3. Why do you think your pulse changed in this way?


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