Thames & Kosmos Hot Ice Crystals handleiding

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Thames & Kosmos

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Handleiding

GEEK

OUT!

WHAT’S

HAPPENING?

The “disturbance” (that is, the

friction) caused by the wooden

stick makes the crystals grow.

Before, the crystallization of

the supersaturated solution

was triggered by shaking or the

addition of seed crystals. You

can easily recognize the needle-

like shape of the sodium acetate

crystals in the ﬂowers. Your

animal shapes and the columns

from Experiments 3 and 4, then,

were also made from lots of

intermeshing crystal needles

rather than one big crystal.

5. Growing crystal

flowers in seconds

You will need:

1 packet crystal salt (sodium acetate),

wooden stick, petri dish, blue dye,

clean jelly jar with lid, distilled water,

pot, trivet, and pot-holder, scissors,

paper label, pencil and tape

Here’s how:

For this experiment, you can

re-dissolve the column from

Experiment 4 in a water bath or

you can make a colorful solution

with a new packet of crystal salt,

as described in Experiment 4.

Then pour the warm solution

from the jelly jar into the clean,

labeled measuring cup, cover

the cup with the jelly jar lid,

and leave it overnight in an

undisturbed location to cool.

Now you will have to display a

little skill. Poke the wooden stick

slowly into the solution.

Pull the stick right out again

before the needles of crystal

arrive at the edge of the cup or

get too heavy.

If the crystallization doesn’t

happen, repeat the last two steps.

Insert a paper towel into the

cleaned measuring cup and set

your ﬂowers into the cup with

their heads pointed up.

For

crystal-

growing

pros

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