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

Niet gecategoriseerd

Thames & Kosmos

36 pagina's

PDF beschikbaar

Handleiding

Barbie and Nikki were examining the rainbow

in the test tube when Barbie looked out the

kitchen window and gasped.

“Amazing!” Barbie shouted in awe.

“It’s a REAL rainbow!” Nikki added.

“Maybe it’s a sign you should wear the

rainbow dress,” Barbie joked.

“I’m not sure how to turn the rainbow into a

dress. I can’t wear this test tube. And aren’t

rainbows in the sky just light shining through

tiny water droplets?”

“That’s true. Everything you see is just light

shining into your eyes!” Barbie said.

“That gives me a new idea for the perfect

dress!” Nikki announced. “Optical illusions!”

Why did the rainbow form in the test tube? What is it

about the liquids in this experiment that allows them

to sit one on top of the others? The answer is density.

Density is how compact a substance is, so the liquids

that are denser are at the boom of the test tube

while the liquids that are less dense are on the top.

Density is the

amount of maer,

or “material,” that is

contained within a volume.

Since the volumes of

all the liquids in this

experiment are the same,

the amount of maer has

to be diﬀerent. The term

for the amount of maer

in an object is called the

mass of an object.

WHAT’S

HAPPENING?

Rainbow Colors

You will need: Test tube, test

tube holder, measuring cup, food

coloring (red, yellow, green, and

blue), spoon, 6 drinking glasses

or cups, baster, sugar, water

Put a half cup of water into

each drinking glass.

Use the food coloring

to color the water in the

glasses red, orange, yellow,

green, blue, and violet. For

orange, mix red and yellow.

For violet, mix red and blue.

Add teaspoons of sugar to

the colored water according

to the amounts listed in the

diagram to the right.

Stir to dissolve the sugar in

the water completely.

Use the baster to carefully

put equal amounts of the

solutions into the test tube

in the following order:

violet, blue, green, yellow,

orange, and red. Add the

liquid slowly, so as to disrupt

the layers below as lile as

possible.

Observe the test tube. What

happens to the colors?

EXPERIMENT

Follow these instructions to make

a rainbow in a test tube using

solutions of diﬀerent densities.

How do rainbows

appear in the sky? Just like

the black ink, white light

can also be separated into

diﬀerent colors. However, to

separate light you can’t use

chromatography; instead a

property called dispersion is

used. Dispersion is the spreading out of the diﬀerent

colors of light as they pass through a diﬀerent material.

A rainbow is formed when light from the Sun hits

droplets of water that are in the atmosphere.

Red: 0

Orange: 1

Yellow: 2

Green: 3

Blue: 4

Violet: 5

Teaspoons of sugar

Bekijk gratis de handleiding van Thames & Kosmos Barbie STEM Kit: Science Saves the Day, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.