Thames & Kosmos Barbie STEM Kit: Science Saves the Day handleiding

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Thames & Kosmos

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Aer all of Barbie’s clothes were organized on

the spinning closet rack, she and Nikki started

to look for a dress for the Gala.

“This is so much beer,” Barbie

said, gesturing to the spinning

closet rack. “I owe you!”

“Well, I still need a dress for

the Gala, too. I was hoping

you had something I could

borrow,” Nikki grinned at the

ﬁlled rotating closet.

“I think I might have

something that will work,”

Barbie said, laughing.

But try as they might, they

couldn’t ﬁnd the perfect

dresses.

Chromatography Dress

Help Barbie and Nikki make a chromatography dress.

Wait

You will need: Fabric sheet, black

marker, string, bowl or plastic tub,

water, two hardcover books, paper

clips, tape, paper towel, scissors,

seam sealant (optional)

Cut the fabric sheet in half as

shown.

Use the black marker to draw a

row of dots about 1 centimeter

above the boom edge of the

fabric. Place the dots about 1–2

centimeters apart along the

boom edge of the fabric. Make

the dots very dark by tracing

over them a few times.

Stand the books up on either

side of the bowl as shown. Hang

the string from book to book

over the bowl, and secure it with

tape. Hang the fabric sheet from

the string with paper clips as

shown. The boom of the fabric

should be 2–3 centimeters above

the boom of the bowl.

Fill the bowl with 2–3

centimeters of water. The water

should touch the boom edge of the

fabric but not the ink dots. Observe

the ink moving up the fabric. It

may take a few hours for the ink to

reach the top of the fabric. Let the

experiment run until you see the ink

colors separate and you are happy

with the result. Remove the fabric,

and let it dry on a paper towel.

Repeat this process several

times on the same fabric until

you are happy with the result.

You can seal the edges of the

fabric with a liquid seam sealant

to keep them from fraying.

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EXPERIMENT

“I know! Why don’t we make our own,” Barbie

suggested. “I have black dye and white fabric.

We could make a black cocktail dress.”

“I would love something more colorful,” Nikki

replied.

“Me too. I know! Remember

in chemistry class

when we learned about

chromatography?”

“You mean the lab where we

separated colors and made

those cool designs?” asked

Nikki.

“Exactly! We can separate the

black dye into other colors.

We’ll have the most unique

dresses at the Gala. I can see

the gorgeous paerns now!”

“Let’s do it,” Nikki replied.

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