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In room 12 we made our own hovercrafts. First of all we had to learn a little bit of information about the hovercraft. It is a vehicle that glides over sea or land on air. Although it is heavy, the … Continue reading
DID YOU KNOW??
In 2nd class we carried out investigations using magnets during science week.
I found out that on the magnet there will be a north and south pole. I found out the metals that magnets are attracted to are iron, nickle and cobalt. I also found out that the magnet is attracted to coins, staples and paper clips. The tinfoil did not stick to the magnet but I think that was because my magnet was not strong enough.
I found out that some magnets aren’t as strong as other magnets. The magnet that I had the coin was not attracted to it. Staples and paper clips were attracted to the magnet.
Click on the link below for information on ‘The Festival of Curiosity’ taking place in the RDS from 25th-29th of July. This unique event will provide an opportunity for parents, families and the public to interact with science as a cultural activity outside of the academic year.
Today we learned a little about magnets and how they work. We found out that they only attract certain types of metal, like iron, cobalt and nickel.
Magnets have two poles, one north and one south. Through experimentation of magnets we were able to show that opposite poles will attract, and same poles will repel each other.
We also tested the ability of magnets to work through various materials. We used paper clips and tested to see if the magnets were working through cotton, tin foil, wood, card, plastic and also water. After testing them we then recorded and discussed our results. We had a lot of fun experimenting with magnets.
Push and Pull Forces
We made a balloon rocket in science today. We learned that a force is a push or a pull. Force gives an object the energy to move, stop moving, or change direction.
How does our balloon rocket work?
It’s all about the movement of air inside the balloon. As the air rushes out of the balloon, it creates a forward motion called thrust. Thrust is a pushing force created by energy. In the balloon experiment, our thrust comes from the energy of the balloon forcing the air out. In a real rocket, thrust is created by the force of burning rocket fuel as it blasts from the rockets engine – as the engines blast down, the rocket goes up!
You will need:
1 long piece of kite string
1 plastic straw
1. Tie one end of the string to a chair.
2. Put the other end of the string through the straw.
3. Pull the string tight and hold onto this end.
4. Blow up the balloon. Don’t tie it. Pinch/twist the end of the balloon and tape it to the straw.
5. You’re ready for launch!
After we had our rockets tested we went about measuring the distance that each rocket traveled. The maximum distance that the balloon could travel was 3 metres = 300cm.
Oval Balloon: Traveled 2 metres & 30cm = 230cm.
Cyclinder Balloon: Travelled 3 metre = 300cm.
Sphere Ballon: Travelled 3 metre = 300cm.
After discussing the test we decided that we needed to have longer kite string available for the test since two balloons reached the maximum length available. Also, we said that we could not be sure if it was a fair test since we didn’t know how many breathes went into blowing it up each time. We decided that we would use a pump to complete the test again in the next couple of weeks and post our results again then. We can’t wait for this investigation to continue.
Over the next few days we will update you and tell you all about the project we presented at the Science Fair. We were very lucky to be picked to take part and we worked very hard.
Last week in 4th class we went to the Young Scientist Fair in the RDS to present our project on pulley systems. We left school at 7:45am on Friday 11th January and returned at 5:30pm. We had a fantastic day and learned so much.
We will tell you a little bit about our project now.
Firstly Miss O’Donnell gave us a set of questions. We were split up into groups and had to discuss answers to the questions. You can see the questions and answers on our display.
After that we discussed it as a class, we watched a video about single fixed pulleys and single movable pulleys.
Then each group were given six blocks. We had to try to move the big red block that we were given. After that we had to stack two blocks on top of the red block and try to move it without them falling. We couldn’t do it but then a boy in our class called Trofim came up with the idea of the pulley.
Some people made homemade pulleys and then we found out if you use a thick rope on the pulley it would fall off the spool .Then there were five people that went out with a teacher and tried to find everyday objects that used pulley systems.
We watched this video about NASA. We saw that even NASA uses pulleys that can hold up to 300,000 kg and they have 3 of them .They use the pulleys for pulling the rocket up and down .The rocket weighs 200,000 kg
We hope you enjoy our project as much as we did!