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in STEM Activities

Classic Baking Soda Volcano Science Experiment

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For our 31 days of STEM activities for kids, I wanted to do science experiments for kids that were easy, but impressive at the same time.

This made a volcano science experiment a must.

We’ve made a volcano science experiment before, but this time, we decided to make it look a little more impressive by adding a play dough mountain around our bottle and making the inside of the volcano a deeper red.

These 31 days of STEM activities for kids will keep them learning and having fun. The volcano science experiment is a favorite!

Why Do Vinegar and Baking Soda React?

What causes the volcano to explode in the volcano science experiment is the reaction between the baking soda and vinegar.

Baking soda is a base and vinegar is an acid. When a base and an acid are mixed, it creates a byproduct of carbon dioxide, which causes the mixture to overflow just like a shaken soda bottle.

When dish soap is added to the mix, it makes things even more foamy and bubbly.

How to Do the Volcano Science Experiment

Supplies

  • Ketchup or tomato paste
  • Vinegar
  • Dish soap
  • Baking Soda
  • Play dough
  • Small bottle
  • Funnel

These 31 days of STEM activities for kids will keep them learning and having fun. The volcano science experiment is a favorite!Volcano Science Experiment Instructions

Place about 2 tablespoons of baking soda into a bowl. Add about 10 drops of dish soap on top of the baking soda and about ¼ of a cup of ketchup or tomato paste.

Mix together gently with a spoon so you don’t make too many suds at once.

Cover the bottle with play dough and place it on a tray. We put ours in a garden box. Carefully pour the baking soda mixture into the bottle using a funnel.

Add vinegar to the bottle slowly, a little at a time. We ended up adding too much vinegar to ours (as you can see in the video), which made our eruption a little less impressive.

Monkey loved seeing the science demonstration and had a lot of fun setting up the volcano and watching the reaction.

If you want to go further with this experiment, you can experiment with various additives to the vinegar and baking soda mixture to see if you can make the eruption more impressive or change the speed at which it leaves the bottle.

Watch our volcano erupt!

Other Volcano Eruption Experiments for Science Fairs

Pumpkin Volcano Experiment for Kids

Erupting Dinosaur Volcano Slime Recipe

Snow Volcano Experiment

 

Visit the other posts in the 31 days of STEM activities for kids series, here! Even more STEM activities for kids, here.

 

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Filed Under: STEM Activities

About Brenda Priddy

Brenda grew up thinking she hated science. But when her 4-year- old daughter was more interested in reading science facts than fairy tales, Brenda realized she had to learn more. Through simple at-home science experiments, Brenda developed a passion for science and now works as a STEMed advocate with a team of science educators to create hands-on STEM projects and curriculum for kids.

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What is STEAM?

STEAM activities for kids promote the idea that science, technology, engineering, art, and math can all work together to help kids become critical thinkers, problem solvers, and innovators!

Join us on our journey to discover just how much fun science experiments can be.

What we do… 

STEAMsational offers STEM and science lesson plans and teaching resources to provide a firm STEM foundation for children in the classroom or home.

All you need to do is find your supplies, gather your scientists, and let the innovation unfold.

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