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Rainbow in a Tube: This is a
really great experiment.
Now we are going to need
Mini test tube
Some food dye in four different colors
Sixty ml of
water 4 cup
where you need to do is place your 4 glasses in a row and add
sugar to each of them. In the first glass
add one tablespoons, in the second glass add 2
tablespoons, in the third glass add three tablespoons
and in the fourth glass add four tablespoons.
Make sure you get the measurements right
because this will become important later on once you've measured the sugar into each of the glass add sixty milliliters of water to each glass.
will dissolve the sugar and create a sugar water solution. you need to mixed the water to make sure that the sugar is fully dissolved into the water. This might take some time. If you find that you have problems dissolving the sugar into the
water why not try using warm water or just
microwaving it for a few seconds.
Then into Glass number one add some red food
dye, into glass number two add yellow food dye, in glass number three use green food dye, in glass number 4 use blue
Next take your test tube and the glass number four use the syringe to fill
the bottom of the test tube with blue sugar solution. Might be to do this three
or four times. Then wash out your syringe with clean
water. Glass number three green sugar solution add very
slowly and carefully into the test tube.
You'll see that the sugar solution sits
on top of the blue. This is because it has a different density to the blue
sugar solution. The blue solution with more sugar is thicker than the
green.Green is thicker then the yellow. And the yellow is thicker than the rest. This means that they sit
on top of each other. in science when a solution is thicker than another we say
that it has more density. Density is nothing to do with weight or size but
simply how many atoms there are inside. If you hold a light up to the rainbow glass
you'll see all the different colors shining thru.