Geo-domes in 2nd class

We constructed a Geodesic Dome in class. First, we made 3D structures using toothpicks and Plasticine to see which structure would be the strongest to use. We found that triangular structures worked best. We made lots of triangles using rolled newspaper and taped them together. We had to make sure that each one was the same length. We attached an oxygen supply to our Dome. We found out lots of fun facts about life on the moon!

Lung Experiment- 4th Class Room 8

Lung Experiment

Equipment- 3 balloons, 3 straws, plastic bottle, scissors, glue and sellotape. (Rubber Glove)

Method

  1. Cut plastic bottle in half using scissors.
  2. Cut straws and glue together.
  3. Secure balloon to end of each straw with tape.
  4. Make hole in lid and put straw through and secure.
  5. Cut other balloon in half and tape to the bottom of bottle.

Result- When we pulled the balloon at the bottom of the bottle it did not work. We replaced it with a rubber glove. When we pulled the glove down the balloons expanded.

Conclusion- When we breathe (inhale) the diaphragm pulls down making the chest expand. This causes air to be sucked into the lungs. When the diaphragm relaxes the air is pushed out of the lungs (exhale).

Junior Infant Engineers

The teddy bears in Junior Infants were delighted that a team of architects and engineers designed and built them some lovely new homes. Watch out Dermot Bannon!

Do Pulley Systems Make Things Lighter?

This year in 6th class for the RDS Science Blast we decided to investigate pulley systems. First we made a single fixed pulley system but discovered that it made no difference to the weight. Then we made a multiple fixed pulley system. We calculated that there was a mechanical advantage of 1.8 with this method. Next we made a multiple pulley system using a movable pulley and a fixed pulley. This had the biggest mechanical advantage 3. Finally we wanted make a structure used in everyday life so we decided on a crane. We made the crane out of modelling wood and used 3 fixed pulleys and 1 moveable pulley. We also made a handle out of an old pencil which attaches to the pulleys and makes the crane work when you wind it. We really enjoyed doing this project.

 

 

 

Hydraulic Bridge

This year our class entered the Intel Mini Scientist Competition and our group was lucky enough to be selected to go to the Regional Finals. Our group’s topic was hydraulics, more specifically hydraulic bridges. We chose this topic because last year two people from our
group went to the previous regional final and three other groups did hydraulic arms and we had an interest in the science behind hydraulics. We decided to investigate hydraulic bridges.

At first we found it very difficult to construct the bridge and came across quite a few problems but after a while we figured it out. In November three judges from Intel came in and judged all the classes’ projects. Our group was lucky enough to be selected to go to the Regional Final! In preparation for the Regional Final we decided to make another bridge out of balsa wood. In December our group went to Blanchardstown IT and after a long day of presenting we made it to the National Finals in Maynooth. We were delighted when we found out we were in the top 1% in Ireland. Then the awards were announced but unfortunately we didn’t we win anything but were still extremely proud of ourselves.

Science in Senior Infants.

We have been experimenting and testing the force of water on objects by investigating things that float and sink.

To begin we collected a variety of items from around the classroom to investigate. As a class we predicted which items would sink and float in water. Next, in our groups, we took turns to test the items to see if they would sink or float. Lastly we sorted the items into two groups; sink or float and we recorded our results.

The second activity we completed was ‘Design a Boat’. Firstly we experimented with a ball of plasticine to see if it would sink or float and if changing its shape would make a difference. Then in our groups we tried to use the plasticine to design a boat that would float. If we were successful we tested our boat to see how many ‘passengers’ (dried peas) it could carry. After a few attempts some groups were successful! 🙂

The last activity we completed was an experiment called ‘Dancing Raisins’. We predicted what would happen to the raisins in water and in soda water and then observed the differences between the two types of water. We were amazed to watch the raisins begin to ‘dance’ in the soda water! Why do you think this happened?! 🙂

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