In Science, we are looking at the process of conducting a science experiment, in preparation for our upcoming Science Fair!

To explore the different aspects of experimenting and testing, we conducted the following experiment:



  • Small zip lock bag
  • Bicarb soda
  • Warm water
  • Vinegar
  • Measuring cup
  • Tissue


  1. Go outside.
  2. Put ¼ cup of warm water into the bag.
  3. Add ½ a cup of vinegar to the bag.
  4. Put 3 tsp of bicarb soda in a tissue and fold the tissue up.
  5. Work fast – partially zip the bag closed, but leave enough space to add the bicarb soda in the tissue.
  6. Put the tissue in the bag and QUICKLY zip the bag completely closed.
  7. Put the bag down, take five steps back and watch what happens.


We predicted what would happen, and from our prediction we formed a hypothesis. Then afterwards, we wrote down our observations. We discussed the explanation for what happened, and it’s application.

Why don’t you try this at home?

Think about what variables you could alter to see what results you get: the temperature of the water, amount of bicarb soda or vinegar, and the size of the bag!

10 thoughts on “Lunch Bag Explosion!

  1. Dear 4/5,
    I loved this how about you guys. i can describe it in one word.BOOM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    from Ella

  2. Dear Miss Lavars,
    that was sooo much fun i would love to do that again!

    Dear Will and Jackson,
    nice picture! hehehe!

    From Abby

  3. Dear Abby,

    I agree,
    he he he 🙂

    From Aimee!

    P.S Peace out!

  4. Dear 4/5 It was incredible I’ll say what happend in one word booooooooooooooooooooooooooooooooooooooooooooooooooooooom!!!!!!!!!!!!!!!!!!!!!!!!!

  5. he he he he he he he he he he and all the mwhaing and heheing has made me thirsty!

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