Watermelon pop Follow FizzicsEd 150 Science Experiments: Comments 0 You will need: A full-size watermelon Ruber bands that will fit around the watermelon (we used 87 x 6mm rubber bands) Option: A platform to raise the watermelon up Safety glasses A hose to clean up People eat the leftover watermelon! Copyright Instruction Video Instruction 1 Put your safety glasses on. Stretch a rubber band around your watermelon. 2 As you add more and more rubber bands you’ll find that they will tend to spread out around the watermelon rather stay in the centre. Try to keep as many of the bands around the middle of the watermelon as possible. 3 You may find it easier with two people stretching multiple rubber bands over the watermelon to speed up the process. As soon as you see the watermelon begin to split, it’s time to step back! The photo above was taken at the exact moment the watermelon started to split 4 Once the watermelon has begun to split it will likely implode at any moment. The image above was taken roughly 4 seconds after the first split was seen in the previous step! 5 Get the Unit of Work on Forces here! Push, pull Friction & spin! From inertia to centripetal force, this unit covers many concepts about Newton’s Laws! Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more 6 School science visits since 2004! – Curriculum-linked & award-winning incursions. – Over 40 primary & high school programs to choose from. – Designed by experienced educators. – Over 2 million students reached. – Face to face incursions & online programs available. – Early learning centre visits too! 7 Online courses for teachers & parents – Help students learn how science really works Why does this work? It’s all about stored energy and applied force! When you stretch rubber band, you store potential energy that can be released as kinetic (moving energy). The watermelon has a thick rind, as such, it can resist the force from many rubber bands. If you concentrate the force of the contracting rubber bands into the same area of the watermelon, eventually the force overcomes the resistance of the watermelon rind and the watermelon implodes… releasing all of the stored potential energy into a dramatic kinetic explosion of watermelon! Variables to test Try thin vs. thick rubber bands. Is there any difference if the watermelon is warm vs. cold? What about different size or types of watermelon? Want another potential to kinetic energy experiment? Try creating a Cobra weave! Learn more! Forces, Friction & Movement Years K to 6 Maximum 30 students School workshop 60 or 90 minutes Online Class Available Read More Enquire Now Exploring Energy Years 3 to 6 Maximum 30 students School science workshop (NSW & VIC) 60 minutes Online Class Available Read More Enquire Now STEM Full Day Accelerator - Primary Designed from real classroom experiences, this modular day helps you create consistently effective science learning that directly address the new curriculum with easily accessible and cost-effective materials. Read More Enquire Now Rubber band powered boat $10.95 inc. GST View Details Add to Cart Trustpilot
As you add more and more rubber bands you’ll find that they will tend to spread out around the watermelon rather stay in the centre. Try to keep as many of the bands around the middle of the watermelon as possible.
You may find it easier with two people stretching multiple rubber bands over the watermelon to speed up the process. As soon as you see the watermelon begin to split, it’s time to step back! The photo above was taken at the exact moment the watermelon started to split
Once the watermelon has begun to split it will likely implode at any moment. The image above was taken roughly 4 seconds after the first split was seen in the previous step!
Get the Unit of Work on Forces here! Push, pull Friction & spin! From inertia to centripetal force, this unit covers many concepts about Newton’s Laws! Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more
School science visits since 2004! – Curriculum-linked & award-winning incursions. – Over 40 primary & high school programs to choose from. – Designed by experienced educators. – Over 2 million students reached. – Face to face incursions & online programs available. – Early learning centre visits too!
Forces, Friction & Movement Years K to 6 Maximum 30 students School workshop 60 or 90 minutes Online Class Available Read More Enquire Now
Exploring Energy Years 3 to 6 Maximum 30 students School science workshop (NSW & VIC) 60 minutes Online Class Available Read More Enquire Now
Years 3 to 6 Maximum 30 students School science workshop (NSW & VIC) 60 minutes Online Class Available
STEM Full Day Accelerator - Primary Designed from real classroom experiences, this modular day helps you create consistently effective science learning that directly address the new curriculum with easily accessible and cost-effective materials. Read More Enquire Now
Designed from real classroom experiences, this modular day helps you create consistently effective science learning that directly address the new curriculum with easily accessible and cost-effective materials.
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