Thames & Kosmos Crystal Nightlight handleiding

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Thames & Kosmos

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Handleiding

TIP!

Use a pencil or a ball-point pen to write

“alum solution” on a narrow strip of

paper or label, then tape the paper to

the glass jar. If you use self-adhesive

labels, cover them with

cellophane tape.

CAUTION!

Have an adult help you! Be careful

not to burn yourself on the hot stove,

and don’t forget to turn the stove off

afterwards!

Growing starter

crystals

You will need:

One packet of alum, measuring cup,

wooden spatula,

2 empty, clean jars, one with a lid,

paper, pencil, scissors, tape, water,

old pot and hot pad, pot holder, paper

towels, piece of cardboard

Here’s how:

Pour the entire alum packet (50 g)

into a labeled jar. Pour in 200 ml

of water (measure 100 ml twice).

Now get your hot pad ready at the

experiment area. Fill the old pot

with enough tap water to cover

the bottom about 3 cm deep, and

bring the water to a boil on the

stove.

Carry the pot carefully to the

experiment area and set it on the

hot pad. Place the jar with the

alum into the pot and stir the

contents with the wooden spatula

until all the alum is dissolved.

When all the alum is dissolved,

take the jar out of the pot with

the pot holder and dry it off with

a paper towel. CAREFUL, IT’S HOT!

THE CRYSTAL

TAKES SHAPE

PART

50 g

Alum

200 ml

Water

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