Sunday, July 2, 2017

Science blog

Introduction: what is force
Force is a strength used in our everyday lives.
If an object is moving ( like a scooter ) it will stop if it hits an object because of the still force.
A toy car needs a push force to move, so if a push force does not push it, it will not move.
A car needs a forward force to move forward.
If you write in a book gravity keeps your arm on the 
book as you write.
To go canoeing you need to push and pull the oar because when you need to move you have to push the oar down one side so you are pulling the otherside. 


Material you will need:


How you make a push and pull rocket balloon:
Tie one end of string to some type of surface or tape it to some type of surface.

Get the other end and pull it through the straw. Pull it firm then attach the other end to another surface in the room.

Blow the balloon up then pinch the end so the air doesn't come out. DON'T TIE THE BALLOON.
Get the tape and double side it so then you can tape it to the balloon and the straw.

As you are holding the balloon shut pull the balloon all the way back. Then let it go and if you want have another student or friend marking where it finishes.

The data that I gathered was the string length, we measured this so we could see the different push and pull force.
The data that we gathered was string angle, balloon size, straw length, tension, time and we had to record notes.     

What variables did I change: 
I changed the balloon size from 25cmX19cm  to 29cmX30cm and the result was better because the balloon went faster than the first three attempts, I recon it was better because there was more air in it so it was faster. 

What did I learn:
I learnt that if you put two balloons  on one straw it slows it down because one of the balloons deflate faster than the other one.

How can I use my knowledge with  push and pull force. I can use it in the playground. My sister doesn't know anything about the push and pull force so I will teach her about the push and pull force.
This is new learning for me because at the start I didn't know what some of the science vocabulary. 


Here you put your string up where you want to.

With the straw.

Then you blow the balloon.

Here you check to see if the balloon is the right size.

Get something or someone to hold it shut then add tape.

Attach the balloon with the tape to the straw so the air loop is facing the opposite way.  

Let the air loop go.

Then see how far the balloon goes down the string and how long it takes the balloon to travel down to the end.

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