5th Grade Science Lesson Plans | Interactive Science Teacher

5th grade science lesson plans

5th graders are a near-perfect age to learn science. They’re naturally curious and excitable; everything seems to fascinate them. At this age, their brains can consume as much as their stomachs! So let’s dazzle and amaze your fifth graders tomorrow with this super-simple science lesson:

An easy 5th grade science lesson- jab a baggie full of water with a ROUND pencil

An easy 5th grade science lesson- jab a baggie full of water with a ROUND pencil

  • Fill a zipper-seal baggie with water
  • Seal it shut
  • Hold the baggie full of water over a student’s head
  • Use a ROUND PENCIL to poke it through one side and out the other using a round pencil
  • Add as much drama as you like
  • It won’t leak!
  • Leave the pencil in it, and announce you’d like another volunteer
  • This time poke it with a 6-SIDED pencil over the head of volunteer #2
  • Oops- different result this time!

WHY does this happen?  The baggie is made of a plastic that’s also known as a polymer.  When you poke the bag with the round pencil, it slips between chains of these polymers, so little water leaks.  However, the 6-sided pencil isn’t as smooth around, so the polymers don’t cling as close to it, which causes the leak.


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