Crazy bottle

Le a r n

fu e v a h and

n

Sanja Matijašević

Y Z A CR

E L T BOT

R E H T O D AN

S T N E M I EXPER

N E R D L I H FOR C

2

Sanja Matijašević

Y Z A CR

E L T BOT R E H T O AND

S T N E M EXPERI N E R D L I H FOR C

I’ve always wondered why scientists are depicted as serious and strict people. I am sure that all of them must have kept a curious inner child within themselves! Maybe this is why I find Einstein interesting. He is mostly depicted with unkempt hair, he is smiling and he has the eyes of a boy. He once said that important than knowledge. That is why imagination is more importa I, Curly, invite you to learn lear something with me on the wings of imagina imagination, by playing.

S E R O T S R E T IN W L A U UNUS

W

Imagine that during hot summer days you cou Now that would be an excellent winter store! ld trap sunrays in a jar. shelf with three jars of sun rays, two jars of I can already imagine my spring breeze and a bottle of warm summer rain - including the rainbo w. wish come true, I managed only to trap a tor While trying to make this it to you only if you promise to never let it nado in a bottle. I’ll show out of the bottle. Promise?

6

t you need: ha 2l plastic bottle

water

some dishwashing liquid

pepper

1. Pour water in the plastic bottle (until it’s a little bit more than half full), add a drop of dishwashing liquid and a spoonful of pepper. Close the bottle well and turn it upside down.

2. Shake well the contents of the bottle by making small circular movements.

3. Once you stop the shaking, you’ll enjoy the amazing sight of a tornado.

Bring the bottle close to a sunny window and the tornado will be even more visible.

er is circling, its ustt between you and me: When the wat Jus of the water closer parts achieve different speed. The part oth ers, which causes to the center is moving faster than the a tornado. the forming of a vortex which looks like 7

WHAT SHOULD I WEAR

W

When dressing is concerned, I meet a bunch keeps bugging me: Why did I wear this swe of problems every day. My sister ater with that shirt? Jeans with orange sewing do not match with that sweatshirt!

Str when I found out that one look through the ipes are out of fashion! Horrible! But win or darker color of clothes, things became a dow is enough to decide on a lighter little easier. Here is the secret.

8

t you need: ha two identical glasses

a white t-shirt and a black t-shirt

a room thermometer

four clothespins and some water

1. Wrap the t-shirts around the glasses (so that the openings are free and that the glasses remain in an upright position).

2. Pour equal amounts of water in the glasses and leave them in a sunny place for 2-3 hours.

3. Use the thermometer to measure the temperature of water in the glass wrapped with the white shirt, and then in the glass wrapped with the black shirt. Why is the water temperature different? They were heated by the same sun, weren’t they?

ch as the black ustt between you and me: Dark surfacestha(su Jus n the brighter surfaces. t-shirt) absorb more light and warmth wear brightly colored clothes That is why in summer time we should less hot. in order to feel more comfortable and 9

THE SUBMARINE CAPTAIN

W

I can be the captain of a submarine whenev er sailor’s shirt, lift up my left eyebrow and sta I want to. I only have to wear my rt to give orders: Submerge! Surface! Enemy in sight, dive quickly! The crew is obedient, so submarine slowly dives into the watery dep I can observe with satisfaction how the ths Rub your eyes, make sure you’re awake and … You think all of this was a dream? No, no… make your own submarine.

10

t you need: ha sparent a tran 2 l plastic bottle

a cup

a test tube (or the packaging of a vanilla stick)

water

1. Fill the bottle with water almost all the way to the top. Put the test tube in the bottle with the opening on top and slowly pour water in it, until its top is a bit above the opening of the bottle.

2. Take out the test tube, and fill the bottle with water to the very top.

Close the test tube with your finger, turn it upside down, and then immerse it in the water. Be careful and make sure that the water and the air do not leave the test tube. Close the bottle well.

3. Squeeze the bottle with your hand and the submarine will dive. Once you release the bottle, the submarine will surface. Try to modify the strength of your pressure. This is how you’ll be able to define the depth in which you’d like the submarine to stay.

applied by your hand is ustt between you and me: The pressure tes Jus t tube and suppresses transferred to the water, which fills the now fill a smaller part of the test the air within it. Because the air will the ssure to the bottle, tube, it will dive. Once you decrease airpre will expand and the test the water will leave the test tube, thee). tube will move upwards (it will surfac

11

THE SECRET OF THE LEANING TOWER

W

One September morning the postman brough Italy. I’ve looked at it and I could not believe t me my friend Dejan’s postcard from buildings and sculptures notice that a tower my eyes. Did anybody among all of these was leaning? Would it fall? Somebody should all the tourists about this! Dejan laughed his war heart out when I told this to him. The leanin n tower in Pisa has still not fallen, and I’ve don g e some research and discovered its secret.

12

t you need: a h

a package of dominoes or ten books of the same size

1. Use the dominoes to make a tower, by putting them on top of each other, but try not to have them overlapping completely, rather try to make them look like a staircase. Try to stack up as many dominoes as possible. Oh, no!

The tower collapsed!

2. Try again, first with a smaller, and then with a bigger distance between the edges of the dominoes. What determines how many dominoes you can stack up before the tower collapses?

3. Try to imitate the Leaning Tower.

Stand straight and then start to lean forward without bending your back.

Stop leaning when you feel you’ll fall!

you are stable as long as your ustt between you and me: Your tower and Jus is situated above its footing. The center (the focal point of your mass)ino, with you it’s your feet. Once footing of the tower is the first dom ybuand tton) crosses the tips of your the center of your stomach (your belllonger stable and you might fall. toes while you’re leaning, you are no 13

THE CIRCUS IS IN TOWN

W

Fearless lion tamers, funny clowns, skillful jug gle a circus show. That’s why, whenever I notice rs… Nothing is as breathtaking as tha to yawn because they’re bored, I run throug t the members of my household start h The circus is here! I gather all of them in the the house and shout: The circus is here! the star of the show - the floating ball. Let living room; I make a bow and present the show start!

14

t you need: ha a ping-pong a hair dryer

ball

a piece of rope

2 chairs

a table cloth

2 clothespins

1. Tie the rope to the backs of the chairs. Place the tablecloth over it and fasten it with clothespins. The stage is ready.

2. Behind the stage (tablecloth) switch on the hair dryer and point it towards the ceiling. Slowly place the ping-pong ball over the hair dryer. It will remain floating in the air.

3. Raise the hair dryer until the ball appears above the tablecloth. The star of the show has arrived! Move the hair dryer from right to left, up and down.

The ball will still float, but it will follow the movements of the hair dryer.

the hair dryer ustt between you and me: The air from Jus ps it at a certain encompasses the ball and in this wayinkee air, and it’s this height in the air. The ball is trapped hair dryer. forced to follow the movements of the 15

MUSICAL GLASSES

W

The kitchen in my house is the room which hid opportunity I have to peak in the drawers, es the most secrets. I like to use every am something new. One day I discovered that the ong the pots and pans‌ Each time I discover winter has an unusual talent. Can you imagin set of glasses we received from grandma last e, these glasses produce different tones, and can use them to play music. I’m sure that there is an identical set of glasses lying aro you und in your kitchen. Go and check!

16

t you need: a h 4 identical glasses

some water

a pencil

1. Place the glasses next to each other.

Pour water in each of the glasses, so that the first glass contains the least water and the last one the most water.

2. Make a small distance between the glasses and then gently strike each of them with the pencil.

3. Combine different numbers of strokes against different glasses and you’ll have your first composition. Why do the glasses produce different tones even though they are the same in size and shape?

ke a glass with a pencil, it starts ustt between you and me: Once you stritran Jus smitted from the glass through to tremble. These small vibrations are least air (the most water) the air to the water. The glass with the glass with the most air (the least produces the lowest tone, whereas the water) produces the highest tone.

17

L e a r n a n d h ave f u n d Let’s play an er! learn togeth

A curious ? e b o t e k li you What would ian, or an ic t a m e h t a m eat scientist, a gr suggestions d n fi l ’l u o y k boo l rer? In this ill help you explo w h ic h w s k s d fun ta s for games an resting thing e t in s u io r a v discover l world that fu r e d n o w e h frrom t u. surrounds yo