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Transcript

By: Joban 8A

Bibliography

1. Podesta, M. D. (2016, January 26). Why do helium balloons float? - Ask a scientist. Retrieved from http://askascientist.co.uk/physics/helium-balloons-float/

2. Discovery Kids. (2016, January 25). Why do helium balloons float? | Discovery Kids. Retrieved from http://discoverykids.com/articles/why-do-helium-balloons-float/

3. Brain, M. (2016, January 25). Floating in General - How Helium Balloons Work | HowStuffWorks. Retrieved from http://science.howstuffworks.com/helium1.htm

4. Betnel, M. (2016, January 26). gravity - Why do helium filled balloons move away from the Earth? - Physics Stack Exchange. Retrieved from http://physics.stackexchange.com/questions/2415/why-do-helium-filled-balloons-move-away-from-the-earth

5. Everyday Chemistry - Why do some balloons float upwards and others don't? (2016, January 27). Retrieved from http://humantouchofchemistry.com/why-do-some-balloons-float-upwards-and-others-dont.htm

6. Buoyancy - Wikipedia, the free encyclopedia. (2016, January 26). Retrieved January 31, 2016, from https://en.wikipedia.org/wiki/Buoyancy

7. How Things Float. (2016, January 27). Retrieved from http://www.seaperch.org/how_things_float

8. Little Known Balloon Facts. (2016, January 27). Retrieved from http://www.qualatex.com/pages/facts.php

9. Facts About Helium. (2016, January 27). Retrieved from http://www.livescience.com/28552-facts-about-helium.html

10. https://www.google.com/search?q=buoyancy&client=safari&rls=en&oe=UTF-8&hl=en&nfpr=&spell=1&oq=buoyancy&gs_l=heirloom-serp.3..0i67l6j0j0i67j0j0i67.1184.3005.0.3095.8.6.0.2.2.0.184.718.1j5.6.0....0...1ac.1.34.heirloom-serp..0.8.723.bwQFYX5J2Tw&gws_rd=ssl. (2016, January 26). Retrieved from http://www.google.com/search?q=buoyancy&client=safari&rls=en&oe=UTF-8&hl=en&nfpr=&spell=1&oq=buoyancy&gs_l=heirloom-serp.3..0i67l6j0j0i67j0j0i67.1184.3005.0.3095.8.6.0.2.2.0.184.718.1j5.6.0....0...1ac.1.34.heirloom-serp..0.8.723.bwQFYX5J2Tw

11. Calgary man flies over city using helium balloons - video | World news | The Guardian. (2016, January 28). Retrieved from http://www.theguardian.com/world/video/2015/jul/07/calgary-balloon-man-helium-daniel-boria-video

12. (Randy Landsberg, Bill Fisher & Dan Robertson) Lighter Than Air: Why Do Balloons Float?(2016, January 25). Retrieved fromhttps://kicp-workshops.uchicago.edu/eo2014/pdf/air.pdf

Hypothesis

Helium Balloons go up because they displace an amount of air. By Displace I mean that the balloon pushes air out of its way (which is called displacing). The Helium and plastic are heavier than the air it will displace causing the balloon to float. Gravity pulls on the balloon but there is also another force pushing on the balloon upwards called buoyancy. Buoyancy means " the ability or tendency to float in water, air or some other fluid. Buoyancy works by if the weight of the object is less than the displaced fluid or gas when merged into each other, which means the object has an average density that is less than the fluid or gas. When they are fully merged, they will come across a buoyancy force that will take the balloon upwards because the gravity is not as great as the buoyancy.

I think that helium balloons go up when you let go of them because the helium particles react to the plain air and want to go up. Helium is probably lighter than air so the Helium wants to go up. The helium inside doesn't have a lot of weight compared to the air around it so the air outweighs the Helium and the Helium then rises up.

I think that the contact between helium and the plastic balloon causes the balloon to displace the Air leaving the Helium Balloon wanting to go up. I think maybe the helium and the plastic are not as heavy as the air so that is why the balloon could go up. This is why I think helium balloons rise/ go up when you let go of them.

Observations continued

Since Helium is lighter than air,

buoyancy comes to work( because the

helium balloon is less than the air's weight) so that lets the balloon rise. TO recap,When the balloon is let go of, it displaces an amount of air. That amount is less than the balloon so then buoyancy comes in and it pushes against the gravity letting the balloon to come upward. As long as the balloon is lighter than the air, the balloon will rise/float. If the balloon is lighter than the air, buoyancy will work.

Observations

Video Time

How Helium Balloons float

Fun Facts

Conclusion

- A liter or about a quart of air weighs about 1.25 grams.

- Helium is lighter than Nitrogen

- A liter of helium weighs 0.18 grams

- A balloon that's 1 foot holds half a cubic foot of helium

- A man in Calgary was charged for mischief because of flying over his city using helium balloons

Purpose

Spongebob

Quick Question

Helium

Balloons

Random

Dude

How many small Helium Balloons do you think will be able to lift you up?

Hey Guys! Today, for my science topic I'll be telling you guys why Helium Balloons will go up or rise when you let go of them?

In the end, my Hypothesis was mostly right because in my hypothesis I stated " That helium balloons float because the helium is lighter than the air around it which is why it floats and my research and observations conclude that helium Balloons go up because the helium is lighter than the air it displaces which is why it floats so that means my hypothesis was kind of right. If I had said helium is lighter than the air it displaces rather than plain air, I would have been more right. I learned about buoyancy through this topic and know I now how important it is to us when we are in boats or using something in the air. I also learned that if somethings density is less than the amount of water/air it displaces, that object can float. In the end, Helium balloons can float because the helium is less dense than the air it displaces allowing buoyancy to work and let the balloon float.

Some Dude holding Helium Balloons

THANK YOU FOR WATCHING!!!!!!!!!!!!!!!!!!!!!:):):):):):)!!!!!!!

HOPE YOU LEARNED SOMETHING AND ENJOYED

What are Helium Balloons

Video

Before stating my hypothesis, I would like to give some background knowledge of helium Balloons.

Helium Balloons are often seen at festivals, parties, birthdays and many more joyous events. They are filled with a gas called Helium. Helium Balloons can be found at many stores such as convenience stores, party stores, dollar stores and grocery stores.

They can be shaped in many different ways such as cartoon characters, or just plain circles/ovals.

Why do Helium Balloons rise when you let go of them?

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