Thursday, May 1, 2008

Can Water Float on Water?

Why, yes it can. And this is how we found out...........(Yesterday the boys wanted to conduct an experiment and while they really wanted to blow something up, we came to a compromise and tried this instead!)

First you grab a large clear jar and fill it three quarters full with cold water.


Measure out a long piece of string.


When you are satisfied cut it off!


Next take a small glass bottle and tie the piece of string around the neck tightly. Then tie the other end around the neck as well to make a loop.


Now we fill our small bottle with HOT water and add a little food colouring!
We chose red as we wanted it to look like a volcano erupting.





Now we lower the small bottle, very slowly, into the jar of cold water.


The Hot red water rises from the bottle like smoke from and erupting volcano!


The red water appears to be floating on top of the clear water!

Why?

The water looks as if it is still, but it isn't.
Its molecules are always moving.
Molecules move more quickly when they are hot.
Hot water always rises to the surface and floats on the cold water.
Cooler molecules sink.

(Wow that was fun mum, NOW can we blow something up?)

Kaboom experiment conducted by Gameboy and Dinoboy


After all this fun we decided to go for a bike ride along the lake. We met up with SIL and Mr Boing Boing and our other friends and went for a ride, played in the park and then rode up a very big hill to get home. Mum was a bit tired as she has not ridden her bike for years! We had a fun day!


Hi everyone, I hope you have enjoyed my guest speakers this week. I am off on my own adventure tomorrow with all the girls! We are heading to Nelsons Bay a bit further north of here to laze around for a couple of days! (I promise to take my camera this time and show you some of the scenery) Have a great weekend everyone!

24 comments:

  1. Wow! We need to try that! Thanks! So cool!!!

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  2. Very nice experiment and wonderful pictures, Karisma.

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  3. I love that experiment! I'm going to have to do that one with my son really soon. Thanks so much for sharing it with everyone out here. :)

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  4. Ooh that's very clever. I like that the boys just wanted explosions!

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  5. josh said

    I am ten years old and i need agood science project i think i might do this because it's cool!


    nov. 24 2009 7:19 pm

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  6. I love this and i used it but i need to fill in a form about the website, but i don't know your last name! not a stalker though.

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  7. Ummm okay! So who are you Anonymous! I go by the last name of Fine!

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  8. thanx so much i was going to do this and i don't know oe to do it you ade my life easy.:)

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  9. i have to do that as a scienc project thx 4 telling me how to that lol :)

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  10. thanks you help our project successful karisma

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  11. hey if you don't like this website just leave
    don't throw trash talks on this web.

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  12. who teach you that your not respecting this web..

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  13. This comment has been removed by the author.

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  14. That was so good, our project was completed. Thank you.

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  15. sounds like a fun project

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  16. My daughter also has to do a science project on Water floating on Water. We have looked at this and wondered if you had done any other experiments on this subject yo could share?
    Thanks, Mark and Amanda

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    1. Hi, sorry no. Its been a few years since we did this one. Hope it goes well for her.

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  17. I have a question ... how do you know if u use a glass bottle?

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    1. You need to use glass as plastic is not heavy enough.

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  18. Okay I have a question, what else can you use besides a jar? And how much is exactly 3 quarters of water? Can u use a normal water bottle instead? Thank you

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  19. i'm 10 years old and i'm in QUEST do you think this would work for me cause i want to do this for my science project :)

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    1. Sure its a really simple but effective project. Give it a try.

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  20. Hi Vivian, Sorry it took me a while to answer, I was away. You could use anything really but you need to be able to see through it so you can see the water colour through the side. If you have a clear container that might work but a glass jar or vase is better. 3/4 means exactly that, 3/4 of what ever size your jar is. You don't want it too full or it will spill over, it does not have to be exact. You want to be able to cover your bottle and have enough room for the hot water to rise above it. As for the normal water bottle, a good idea is to give it a try. Thats what science is all about...experimenting and seeing what answers you come up with. Good luck.

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