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# Science Fair Project

Miniature hot air balloon
by Adam Wooten on 27 January 2013

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#### Transcript of Science Fair Project

After putting the ice tray under the hot air balloon and lighting the candles, the hot air balloon filled with warm air and then rose 6 to 10 inches up in the air. However, the balloon did not perform well enough to be able to attach surveillance cameras onto it. The bigger bag worked better than the smaller bag that we used in previous models. Results Step 1: tape three bamboo sticks together so they go across the opening of your bag vertically
Step 2: tape two bamboo sticks together so they go across the opening of your bag horizontally (adjust the amount of sticks to what fits your bag)
Step 3: tape the middle of each extended bamboo stick together so they make an X Procedure 5 bamboo sticks: 0g
245cm squared Aluminum foil: 0g
plastic bag: 12g
3 candles: 4g
tray: large
ice: enough to fill the tray Materials The dependent variable is the weight of the craft.
The Independent variables is the size of the bag.
The constant in this experiment is the amount of candles. Experimental Design www.ucar.edu
Convection is when hot air rises, cools, falls back down, heats up, and then completes the cycle. When the hot air is rising in the convection cycle, the hot air balloon rises with it. Background Research 4 www.spacefoundations.org
Temperature is a key reason that hot air balloons float. Hot air balloons are powered by the heating of air which then rises, gets trapped by the balloon, and it pushes the balloon up. Background Research 2 If I use materials that weigh about 30g or less altogether, then according to numerous sources such as K12 Earth Science course, the hot, less dense air will get pushed up by the colder, denser air and the craft will rise. I also think that the bigger the bag, the better it will fill with air to make it rise. Hypothesis This experiment is to see if I can assemble materials to make a small scale version of a hot air balloon that is light enough to be lifted when the less dense air in the bag rises up because of the denser air pushing below it. This way of flotation could be used as surveillance in clear weather. Purpose By Adam Wooten Science Fair Experiment http://www.eballoon.org
http://www.k12.com Earth Science Unit 5 Lesson 3
http://physics.kenyon.edu/EarlyApparatus/Pneumatics
http://www.spacefoundations.org
http://www.ucar.edu Bibliography The miniature hot air balloon rose off the ground. Evidently the materials in the balloon were light enough for the less dense air to be lifted off the ground. The small bags that I used for my first models were too small and heavy to lift the materials, but when I used bigger lighter bags, they were able to complete their task. Although the experiment worked, I may have been able to drop unnecessary weight by using less tape. If I were to do this experiment again, I would improve my design and see how much extra weight the craft could hold. Conclusion Step 9: get a partner to hold the bag over the tray of ice while you light the candles (be careful not to melt the bag)
Step 10: within minutes, the bag should fill up with hot air and float upwards (If you have trouble getting it to float, lift the bag up, and then let it go) Procedure Step 4: tape the four ends of your X to the inside of your bag
Step 5: cut 6 candles in half
Step 6: get a small square of aluminum and melt the half candles on to it
Step 7: tape the aluminum foil with the candles on it to the X in your bag
Step 8: put ice in tray Procedure http://physics.kenyon.edu/EarlyApparatus/Pneumatics
The average density of air is 1.239 milligrams per cubic centimeters. Because of this information we know, that to make the air rise, the density needs to be much less than 1.239. Background Research 5 www.eballoon.org
To lift 1,000 lbs off the ground , one would need about 65,000 cubic ft of hot air! The three parts of a hot air balloon are the envelope, the burner, and the basket. Background Research 3 www.k12.com Earth Science Unit 5 Lesson 3
Heat decreases density, and less dense air rises. Cold air is dense, and dense air sinks. Background Research 1 Adam Wooten
Mrs. Williams
I have always been interested in how hot air balloons worked, and when I researched it, I realized that I would be able to make a smaller version of one. Making A Miniature
Hot Air Balloon The miniature hot air balloon rose off the ground. Evidently the materials in the balloon were light enough for the less dense air to be lifted off the ground. The small bags that I used for my first models were too small and heavy to lift the materials, but when I used bigger lighter bags, they were able to complete their task. Although the experiment worked, I may have been able to drop unnecessary weight by using less tape. If I were to do this experiment again, I would improve my design and see how much extra weight the craft could hold. Conclusion Step 9: get a partner to hold the bag over the tray of ice while you light the candles (be careful not to melt the bag)
Step 10: within minutes, the bag should fill up with hot air and float upwards (If you have trouble getting it to float, lift the bag up, and then let it go) Procedure Step 4: tape the four ends of your X to the inside of your bag
Step 5: cut 6 candles in half
Step 6: get a small square of aluminum and melt the half candles on to it
Step 7: tape the aluminum foil with the candles on it to the X in your bag
Step 8: put ice in tray Procedure 5 bamboo sticks: 0g
245cm squared Aluminum foil: 0g
plastic bag: 12g
3 candles: 4g
tray: large
ice: enough to fill the tray Materials http://physics.kenyon.edu/EarlyApparatus/Pneumatics
The average density of air is 1.239 milligrams per cubic centimeters. Because of this information we know, that to make the air rise, the density needs to be much less than 1.239. Background Research 5 www.eballoon.org
To lift 1,000 lbs off the ground , one would need about 65,000 cubic ft of hot air! The three parts of a hot air balloon are the envelope, the burner, and the basket. Background Research 3 www.k12.com Earth Science Unit 5 Lesson 3
Heat decreases density, and less dense air rises. Cold air is dense, and dense air sinks. Hot air balloons are powered by the heating of air which then rises, gets trapped by the balloon, and then pushes the balloon up. Background Research 1 If I use materials that weigh about 30g or less altogether, then according to numerous sources such as K12 Earth Science course, the hot, less dense air will get pushed up by the colder, denser air and the craft will rise. I also think that the bigger the bag, the better it will fill with air to make it rise. Hypothesis Adam Wooten
Mrs. Williams
I have always been interested in how hot air balloons worked, and when I researched it, I realized that I would be able to make a smaller version of one. Making A Miniature
Hot Air Balloon By Adam Wooten Science Fair Experiment www.eballoon.org
www.k12.com Earth Science Unit 5 Lesson 3
http://physics.kenyon.edu/EarlyApparatus/Pneumatics
www.spacefoundations.org
www.ucar.edu Bibliography After putting the ice tray under the hot air balloon and lighting the candles, the hot air balloon filled with warm air and then rose 6 to 10 inches up in the air. However, the balloon did not perform well enough to be able to attach surveillance cameras onto it. The bigger bag worked better than the smaller bag that we used in previous models. Results Step 1: tape three bamboo sticks together so they go across the opening of your bag vertically
Step 2: tape two bamboo sticks together so they go across the opening of your bag horizontally (adjust the amount of sticks to what fits your bag)
Step 3: tape the middle of each extended bamboo stick together so they make an X Procedure The dependent variable is the weight of the craft.
The Independent variables is the size of the bag.
The constant in this experiment is the amount of candles. Experimental Design www.ucar.edu
Convection is when hot air rises, cools, falls back down, heats up, and then completes the cycle. When the hot air is rising in the convection cycle, the hot air balloon rises with it. Background Research 4 www.spacefoundations.org
Temperature is a key reason that hot air balloons float. Hot air balloons are powered by the heating of air which then rises, gets trapped by the balloon, and it pushes the balloon up. Background Research 2 This experiment is to see if I can assemble materials to make a small scale version of a hot air balloon that is light enough to be lifted when the less dense air in the bag rises up because of the denser air pushing below it. This way of flotation could be used as surveillance in clear weather. Purpose https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=23251ceb36&view=att&th=13c2d4fa2fec9b9f&attid=0.1&disp=inline&safe=1&zw&saduie=AG9B_P-Jq_FNXCG5XDWT4DWUB8wg&sadet=1357969898294&sads=iMURxdcLrzNMoV8ziessC4YVzOE
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