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Saturday, 21 August 2010

Simple science experiments

A couple of simple experiments we've had fun with recently.

The floating egg.
Half fill a glass jar with water. Put a raw egg into the jar. It sinks.
Take the egg out.
Add a couple of teaspoons of salt to the water. Now the egg floats.
The egg floats in salt water because of density.


Slime.
Mix 1 teaspoon borax in 1 cup of water. Stir until the borax is dissolved.
In a separate container, mix 1/2 cup white glue with 1/2 cup water. Add food coloring if you want.
Combine the dissolved borax and the diluted glue. Stir.
Stir, stir, stir.
Stretch, knead, pull, shape..lots of fun.


How plants drink.
Add a celery stalk to a cup of food dyed water. Leave it for some time and then have a look.

6 comments:

  1. Hi Kelly, I remember doing the egg experiments when i was young. Kelly, my boys love making their own weird mix of things, usually they mix flour (I buy them their own cheap white flour, food coloring, eggs, some sugar) whatever they can scrounge from the kitchen. They did this for a few months, sitting on the front step of our living room. Always a lovely mess but they enjoyed it. I must try the slime. I use borax mixed with sugar to kill cockroaches!

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  2. I remember doing egg experiments as well...the one with the candle in the bottom of a bottle that sucks it in. We also used to make slime but it was with cornflour because that appears liquid until pressed and then goes all weird and hard.....mum used to put green colouring in and call it snot (very gracious sort of a lady my mum lol).

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  3. I like these experiments!...I will do it with my boys...

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  4. I love simple experiments. And snot ;-)

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  5. it sounds as though you all are having a wonderful time exploring!

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  6. Hi, thanks for this, we have to do the celery thing! That's neat!

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