Simple 6th, 7th, 8th Grade Science Fair Project


This is a simple science fair project to
show how water expands when it’s heated. So basically we’re going to take a
plastic bottle, fill it with some water, add some food coloring, and then we put a
straw through the bottle cap down into the water. After that will take lamp and shine it on on the bottle, and the water warm up. If the water
expands, if it undergoes thermal expansion, its gonna have to go somewhere and up
the straw is the only option it has. So our data is going to be how much the water rises in the straw. Pretty simple right? But to really impress the judges at a
Science Fair or to impress your science teacher at
school, you need to have a topic that’s interesting and important. And this is why
thermal expansion water is important. There’s a lot of
water on our planet fact about seventy percent
of the earth is covered by water. So if the average temperature on earth
increases, then the water is going to expand and will
occupy more volume. But like the water in the bottle it has
to go somewhere and that somewhere is over islands in up the coast. This is what we call sea level rise sea
level rise. It is a slow process but it’s happening right now and the sea will continue to rise and
thermal expansion water is a major factor in sea level rise. So that’s what makes
this project interesting and important and that’s what will make your
work stand out, because many people don’t realize that thermal expansion is an important factor in rising sea
levels. So my hypothesis might be: If water is heated then it will expand occupied more volume. And then I could
test that. So to test that I took a 750 milliliter
Dr. Pepper bottle, a two liter bottle would work as well, and I
drilled a hole in the cap of the bottle so straw just
squeezes through. Then I sealed around the bottle cap to make sure that no water could leak out. I used a hot glue gun but caulk or
waterproof sealant work just as well. So I filled my bottle
of water, I put in some dark food coloring, and
then I put the cap on. Make sure that the water is up a little
bit in the straw. Before I turned the lamp on, I collected data as to how high the
water was in the straw. Then I shiny incandescent bulb, those are the one’s that get hot, on the bottle. You could use a
thermometer in the bottle if you want to collect
temperature data. But to minimize materials I just measured how high the water went
in the straw and I did that every 15 minutes. So here’s a few data
points: we have our initial data point before we
turn the light on 15 minutes, 30 minutes 60 minutes and then all the way up to
two hours. At that point I had to stop because it
was about to overflow. Two things to note: one is it nothing
happens, you turn the light on and the water doesn’t rise, you probably
have a leak. So you want to make sure that there are
no leaks, even a tiny leak can cause problems. The other thing is you may want to have
a control group. This is an identical bottle with a straw
and the bottle cap and the food color and water, but you don’t put it under the lamp. You
still collect data, but it shows you that if
nothing happens in the control, that the lamp is really what’s causing
the water to get warmer and to expand. You should follow the format provided by
the science fair or by your teacher to write the project
up. But remember what’s interesting here, in addition to your
data and how you present that, are the implications for your project. If
you can discuss how sea level rise relates to the work that you’ve done, how
your bottle with a straw and the water is a model for sea-level
rise, that will really make you work stand out. This is Dr. B, and thanks for watching.

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100 thoughts on “Simple 6th, 7th, 8th Grade Science Fair Project”

  1. Stacember says:

    Would you consider this Conservation or Thermochemistry

  2. Stacember says:

    Or oceanography

  3. Logan Lebario says:

    Oh ok

  4. Logan Lebario says:

    Ok thanks!! for the help I appreciate it !!

  5. Logan Lebario says:

    +Wayne Breslyn

  6. Evaney Roldan says:

    i am starting the project today thank you

  7. Evaney Roldan says:

    Dr.B. could you give me some reseach about this

  8. Evaney Roldan says:

    This did not work

  9. Evaney Roldan says:

    my light bulb gives heat and the water is the same hight as the bulb i am freaking out i wont have time to finish!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  10. Its Gio says:

    do u really need food coloring?

  11. Logan Lebario says:

    Thx +Wayne breslyn

  12. Lea Gauvin says:

    guys dont use this its not a science fair worthy project trust me. It does not represent the ocean sea level rise because the oceanhas an open atmosphere with air as the bottle has no air so the water has nowhere else to go than in the straw.

  13. L Hebert says:

    I see you used food coloring in your water
    Won't that effect the results at least a little if someone used just regular water?

  14. L Hebert says:

    So I'm working on this and I'm on the part with the lamp and I'm wondering: are you using a flat lamp or did you put a piece of paper in front?

  15. Glaithius says:

    Yah but what's the question your trying to answer??

  16. Shelley Quilalang says:

    Should it be really a 750 ML bottle? And a exact 100Watt?

  17. Emily Helton says:


  18. Emalisa Muniz says:

    I think I'm going to do this

  19. Raging Golem123 says:

    wow amazing it helped me out of a jan

  20. Raging Golem123 says:


  21. Raging Golem123 says:

    i had to do a report in 5 days

  22. Raging Golem123 says:


  23. desiree rivera says:

    Do you have to put something between the bottle like a paper or cardboard ?

  24. Neat Geek says:

    what category would this land on?

  25. Unity says:

    could i use blu-tack as the sealant?

  26. just_ shaelyn_ says:

    So what would the testable question be ?

  27. Shawn Moniz says:

    So what would my independent dependent and controlled variable's?

  28. Matthew Lolkk says:

    What's the independent variable

  29. Matthew Lolkk says:

    Plz answer

  30. Sofia vivas says:

    what kind of problem statement would be best for this experiment?

  31. Brianna Aponte 2 says:

    Damn was gonna do this but so many people are

  32. TheSelena2721 says:

    what would the variables be for this project?

  33. Tony Tastic says:

    What are the variables

  34. Tony Tastic says:

    what is a good question that would match the hypothesis

  35. Zeus says:

    but why is the result and results analysis plz help

  36. Erik Arevalo says:

    whats the conclusion

  37. Imaan Ahmed says:

    so im working on my E.D.D., would this be a good question?:
    How does an incandescent light bulb affect the rise of salt water?
    please reply soon, my E.D.D. is due in 2 days

  38. Miriam Evans says:

    my science fair is due in 4 days do you think I can pull it off

  39. aylyn espinoza says:

    what would be the conclusion of the experiment plz answer back cause my project due tomorro

  40. Dayana Toro says:

    what would the title for the project be

  41. Emma Ouellette Ferreria says:

    does the water have to be at room tempertaure?

  42. Anupriya A says:

    good idea. ive been searching for a good topic for the past 2 weeks and i have found one THANK YOU

  43. Valerie Zhang says:

    This is sooo great! What a great idea! THANKS A LOT!!!! you really helped me, i have been searching for a topic for the last couple of weeks, this helps a lot !!!! One more time THANKS!

  44. just a vee says:

    is the food coloring absolutely necessary?

  45. Captin Carl says:

    wait but wouldn't the water evaperate from the top opening of the straw

  46. KitPlayz says:

    So I'm guessing this project is good enough because I'm a 5th grader and I want to go on the science fair and I need a simple and most average grade project

  47. Quatrapon says:

    Thank you kind sir. We have to give the idea for the science fair on January 20th, three days. I just started doing the project. Thank you. 7th grade btw.

  48. Leah Zhang says:

    How does the water rise up the straw? Do you have to have it?

  49. Cooking with Rada says:

    Do we have to put in food coloring? Please reply

  50. Hammad says:


  51. Christopher Torres says:

    question why is the water blue

  52. Tobechi Onwuka says:

    Dr. B do u have another way could represent this other than using the straw and the water bottle i dont want to copy u entirely but i like this idea and i want to do it for my project. It would be great if u respond asap thx 🙂

  53. Tishanna Rabsatt says:

    How far does the straw have to be?

  54. Charlie Duy says:

    its not working wayne

  55. Charlie Duy says:

    plz help me out i did everything and i dont see the water rising at 0mins there wasn't no water in straw but yours in 0mins there was water already

  56. Virtual Clan says:

    What was the temperature set at

  57. Booger Boi says:

    It's not working

  58. Booger Boi says:

    It's working now thank your the best

  59. SGL Gaming and More says:

    I need three diffrent videos on this same thing or I fail nonooooooo

  60. The Dreamcatcher #dreambigandfar says:

    what are some variables I could use

  61. SARATOU DIALLO says:

    thank you soooooo much dr B
    I got first place on my science fair project all because of you
    thank you sooo much

  62. Gageroo62 says:

    shut the fuck up u stupid bitch none of these work

  63. Thuyan Dang says:

    To anyone who did this project, did it work?

  64. Abineshgood ddfAswin says:


  65. Marc Spencer says:


  66. FX RED RIDER says:

    does it give you first place

  67. Meme_ Dealor says:

    Thank you

  68. Turnedjetprime 35 says:

    It doesn’t work so don’t waste your time and money on this stupid project unless you somehow got it to work which is probably you lying and just trying to make this guy feel better which I respect in a 1/2 kinda way

  69. lil kamonie says:

    What kind of lamp did you use?

  70. Warriortyler07 says:

    what are the variables?

  71. Jennifer K says:

    not all heroes wear capes!!!!

  72. Renn Hendrix says:

    What's the purpose of the project

  73. Victoria Huynh says:

    I really want to do this but I have to do a question. So how do you put this experiment into a question?

  74. powernutz squad says:

    Thanks bro

  75. Warriortyler07 says:

    what is a good problem/purpose for this project? plz help 😉

  76. Warriortyler07 says:

    what would the experimental group be?

  77. Reya Singh says:

    What would the question be?

  78. Abhishek Srivastava says:

    I think its the shape of the bottle which changes because of the bulb heat. not the water expansion

  79. Reya Singh says:

    Would there be the same effect if I put salt into the water to represent sea water?

  80. rachet .vlogs says:

    Aye man is it ok if I kinda copy it word by word on my science project it's because I don't have any more time to do another project and this is the only video that is interesting

  81. Michelle Blackwell says:

    What would the question be

  82. JEO 777ez says:

    What would the concept be?

  83. Hanan Aslam says:

    Can we use a candle

  84. Jaahanavi Kommineni says:

    What could the question be?

    Answer me fast. please !!!!!

  85. Khalil Nusair says:

    thank you helped me in my science fair the day after tomorrow
    u saved my life

  86. KING BALLA says:


  87. KING BALLA says:

    lit cuh do it again cuh

  88. Marzin Maazin says:

    thanks for the help

  89. jai Shree krishna says:


  90. Random Person says:

    Am late and I just found this thank you so much

  91. SUGA FREE says:

    should i do this for my science project (pls someone help me)

  92. Như Lâm says:

    Thank you so much! You save me! The project did not cost me a lot of money and the idea is genius!

  93. Dee Avriett says:

    Can u use normal water

  94. Rubber Duckiesss says:

    My project is due on Wednesday and I haven’t done anything worrying about what I’m going to do. But now that I watched this I will try this out thank you so much.

  95. C e c i P l a y z ._. says:

    What is the purpose of the food coloring??

  96. TheOfficialJeb_ says:

    246,647 Used this science fair project

  97. Isaiah Adams says:

    I'm just going to fake the project for my science fair and take picture's of the straw with water already in it and just act like I did it

  98. Savage 9000 says:

    But won’t that water evaporate

  99. yogirl norma says:

    HELP HELP HELP what is the background information for this ANSWER ASAP PLS

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