Why Do Mexican Jumping Beans Jump When They Get Warm ?

by Louis
(Denver)

Mexican Jumping Beans

Mexican Jumping Beans

My child did a science fair project to explain why Mexican jumping beans jump when they get warm. It was really fun and was SO popular with everyone!

We had people hold them in their hands, and as they warmed up, they began to jump. This was done under a lamp, and without any heat or light in darkened cooler to show the different levels of activity of the jumping beans.

Recently I ordered some more for a 'yet to be decided' science project; there are so many possibilities. Check them out, you can now buy Mexican jumping beans online at

https://www.amazingbeans.com

Let me know how it goes!

Barry's Response - Sounds like a riot. Thanks Louis.

Shall I let them in on the secret - These seeds have small moth grubs living inside them. When heat is applied to the bean, because the grub twitches from the heat. Even sunlight produces enough of a heat sensation to elicit this reaction.

The larva lives inside and feeds off the inside of the seed for a month or more. Then it goes through its metamorphosisif it survives that long and emerge an adult moth the following spring, with a life span of less than a week afterwards.

They have been marketed as toys (of sort) for decades and you can even find them on eBay. To keep them alive, moisten them well in rain water every couple weeks and keep them relatively cool and dry otherwise. They will die from excessive heat or freezing.

Search this site for more fun information now.

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Science Fair Projects.



Do you have concerns about air pollution in your area??

Perhaps modelling air pollution will provide the answers to your question.

That is what I do on a full-time basis.  Find out if it is necessary for your project.



Have your Say...

on the StuffintheAir         facebook page


Other topics listed in these guides:

The Stuff in the Air Site Map

And, 

See the newsletter chronicle. 


Thank you to my research and writing assistants, ChatGPT and WordTune, as well as Wombo and others for the images.

GPT-4, OpenAI's large-scale language generation model, helped generate this text.  As soon as draft language is generated, the author reviews, edits, and revises it to their own liking and is responsible for the content.