Optical Illusions: A Nano-Girl Experiment - SLJ 2021-2022

Explanation of Optical Illusions (From Nano Girl): 

Optical means to do with our eyes, and optical illusion is where our eyes see something that isn’t really there.

Cartoons are optical illusions. Traditional cartoons are made up from thousands of drawings that are shown so quickly that your brain thinks the drawings are moving. 

What I will be doing:

Another way you can do this is using the science of refraction which is where light bounces differently through water than it does through air. If you draw an arrow on a piece of paper and then look at it through a glass of water, it seems to change direction but it’s just a trick on our eyes.

I have decided to draw an arrow, this is how it turned out:

I drew an arrow to the right and as you can see it has become an arrow to the left!

This is my arrow before hand.

I found out that if you put it close enough to the glass, the illusion does not work.

What next?:

An arrow was a practice, so now I decided to draw a stick figure!

My Stick Figure is holding an orange so you can see whether it switches sides or not:

This is how it turned out! It worked :)

Find Your Fingerprint: A Nano-Girl Experiment - SLJ 2021-2022

 Fingerprints are marks that are left by the grooves inside your fingers. All fingerprints are different! There are three types of finger prints, loops, whorls and arches. What are yours? Mine are whorls. Our job is to find and record our fingerprints. You could use tape or something sticky like play dough to find these marks. Get to work!

Are there any other different types of finger prints in your house hold? 

Mum - Whorl

Dad - Loop

Brother - Whorl

What did you use to get your finger print? 

I used a piece of tape and some pencil led. I scribbled the pencil up and down until there was a generous amount. Then I rubbed my finger in the led all over. After that I put the tape on top of my finger, the led transferred to the tape with my finger print on it. When you put it on paper you can see it clearly. 

Something that will Float: A Nano-Girl experiment - SLJ 2021-2022

 A few Facts:

Things float because of something called buoyancy.  This describes how "floaty" or "Buoyant" something is. Wood floats really well because of air bubbles trapped inside the wood. Materials like rocks, which are just solid and have no air, this means it sinks. Things like this are called DENSE. If something is heavy like a boat, it has to have air in it, in order for it to float. 

Task:

Make something that floats! It could be anything, just something lying around your house. Test your invention, by measuring how far it floats, and how much it can carry. 

What would you change? : Sail (make the width smaller)

What did I notice? : It went around in small circles

Why did this happen? : I think this happened because the sail wasn't the right size

Share:

Something that will fly: A Nano-Girl experiment - SLJ 2021-2022

The First Challenge that started off the SLJ was a Nano Girl experiment. I unfortunately missed this, and only saw it today. So I decided to do it! For my flying thing I chose a paper ball. The reason why is because it is simple and easy to work with, if it broke I could make another. This was super fun and I asked and answered different types of questions. Can't wait for another one of these challenges! Make sure to check out the video below. Enjoy :)

 4 Forces: 

Gravity is the force that pulls down.

Lift is the force used to get things up and to keep a plane up in the air, the air flows underneath the wings.

Thrust is the force of moving things forward such as a plane: engine moves it forward.

Drag is the force that slows things down, create a pointy end to reduce drag.

Paper Ball:

1 Piece of Paper ball - 11 of my own Feet (Size 10) 

2 Piece of Paper ball - 9 of my own Feet (Size 10)

What did I notice? : I noticed that the smaller ball went further (same thrust for each ball).

Why did this happen? : I think this happened because of the weight difference. 

What would I change? : I would make the ball more compressed, and add a bit more thrust into the throw.