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  • Gloria Hoffner

For every reaction

FREE Science for Seniors Tuesday activity! Merry Christmas Eve - for everyone eagerly waiting on dinner here is a fun science activity that can be done at the table with family and friends!! Wishing everyone the very best of this holiday filled season!!!

Materials: Pencil and a friend

Process: Hold the pencil above your friends slightly open fist and tell them to grab it as you drop it.

Result: The pencil falls. When your friend's eye sees the pencil drop, his/her mind received a signal to grab it but the delay in time from the signal to the brain to the action by the hand allows the pencil to fall. The time lost between thought and action is reaction time.

If you drop the pencil yourself between hands, you grab the pencil before it falls. This is because your commands to drop and grab are simultaneous.


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