Wednesday, September 30

Oozing Pumpkins STEM Experiment

Halloween is coming!  Families will be carving pumpkins and decorating their houses with them.  When Halloween is over, these pumpkins will be thrown away, fed to animals, or tossed into compost piles.  But... these pumpkins can be used for something fun and educational before being disposed of... science!  Read on to learn more about a fun science experiment you can do with these leftover pumpkins.


Combine baking soda and vinegar to create an exciting chemical reaction! Oozing Pumpkins is a fun STEM science experiment for children of all ages.

Disclosure: Affiliate links to Amazon are included in this blog post.



Making an oozing pumpkin is an exciting... and messy... way to teach children about chemical reactions. A chemical reaction occurs when two or more substances are combined together to create something new. In this experiment, you will combine vinegar and baking soda to make a 'foam' that consists of sodium acetate, carbon dioxide, and water.

For this science activity, you will need:

  • a carved pumpkin
  • dish soap
  • baking soda
  • vinegar
  • food coloring (optional)



Directions:

  1. In a small bowl, combine some dish soap, food coloring, and baking soda.  Exact amounts aren’t necessary.  The more dish soap, vinegar and baking soda you use, the larger the chemical reaction will be!  Mix everything thoroughly.
  2. Pour the mixture into the bottom of the pumpkin.
  3. Slowly pour some vinegar into the pumpkin.
  4. Stand back and observe.  You should see a big, foamy, mess ooze from the pumpkin’s eyes, nose, and mouth!

Combine baking soda and vinegar to create an exciting chemical reaction! Oozing Pumpkins is a fun STEM science experiment for children of all ages.

This science experiment can be done more than once.  Just dump everything out of the pumpkin and repeat the process.  You can experiment with different amounts of vinegar, baking soda, and dish soap to see what happens.

Important Notes  

Do NOT drink the vinegar or sodium acetate.  It will make you sick!  Also, if you have a compost pile, do NOT put your oozing pumpkin into it.  Vinegar, baking soda, and sodium acetate will destroy the beneficial microbes in your compost pile that makes everything decompose.

Combine baking soda and vinegar to create an exciting chemical reaction! Oozing Pumpkins is a fun STEM science experiment for children of all ages.

Did you enjoy reading about this oozing pumpkins STEM experiment? If so, check out these blog posts for more pumpkins and STEM activities:


8 comments:

  1. This looks like so much fun to make! Can’t wait to try ��

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    1. Hehehehe... when you do... be sure to use lots of newspaper and paper towels... it can be VERY messy!

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  2. This looks like a fun and easy experiment. Definitely sharing with my mom friends.

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    1. It really is an easy experiment to do to. I hope you and your friends have fun giving this experiment a try!

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  3. Fabulous tutorial!! The kiddos will LOVE THIS!! I'd love for you to share over at our weekly Wednesday Creative Crafts Linky Party
    https://creativelybeth.com/creative-crafts-linky-party-9-join-in-the-fun/
    Have a great week!
    Creatively, Beth

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    Replies
    1. Thanks Beth! I'll swing by and check it out! <3

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  4. I wonder if you could do this experiment then use the same pumpkin to do the life cycle experiment?

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    Replies
    1. You are the first one to ask me that question! Sadly, it more than likely wouldn't work to use the same pumpkin for both experiments. Vinegar and baking soda are often used in cleaning solutions because they help to kill germs, bacteria, and fungus... everything the pumpkin would need to decompose quickly. I'm honestly not sure what would happen if you used the same pumpkin for both... it could be the topic for another science experiment!

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