Using books and A4 paper the class had to design a bridge that toy cars could drive over. If you used a single piece of flat paper the bridge collapsed under the weight of the car. You were not allowed to use anything other than paper to strengthen the bridge.
Working in pairs the children came up with lots of successful designs. These included:
- Using several pieces of flat paper.
- Folding a sheet of paper 2 or 3 times.
- Folding up the sides of the paper.
- Making an arch (using two pieces of paper).
Our class is full of scientists and engineers.
We put some milk into a wide bowl. We added some drops of food colouring, red, blue, green and yellow. We then dropped a blob of washing up liquid into the middle of the milk.
You can see in the picture what happened. The colours swirl and mix in the milk. This is because the washing up liquid breaks up the fats in the milk causing the colours to swirl.
This is why washing up liquid is so good and cleaning dirty dishes!
We conducted two science experiments today.
The first is called Bouncy Egg. We put an egg into a cup full of vinegar. Vinegar is an acid, and although an egg shell is hard it contains lots and lots of tiny holes. Vinegar is an acid. The vinegar will dissolve the egg shell so the the egg becomes ‘bouncy’ and rubbery to the touch.
You can see all the bubbles on the surface of the egg in the picture.
The second experiment was called Dancing Raisins. We placed a handful of raisins into a glass of fizzy water. They fall to the bottom. Fizzy water contains a gas (carbon dioxide). The gas bubbles attach to the raisins, making them more buoyant so they rise to the top of the glass. As they hit the surface of the water the bubbles pop and the raisins fall back to the bottom of the glass again.
Today we made circuits using batteries, wires, bulbs and buzzers! Once we got the hang of making a circuit it was quite easy. First we made a circuit with a bulb that we were able to make light up. Then we made a circuit with a buzzer. That was very noisy! Finally some of us even made a circuit with a buzzer and a light.
We had great fun.
This week is Science Week. It is the 20th anniversary of Science Week in Ireland. You can find more information on their website here.
Here are some interesting and funny science facts. (From a website called Science For Kids. )
- Butterflies taste food by standing on top of it! Their taste receptors are in their feet unlike humans who have most on their tongue.
- Most of the dust in your home is actually dead skin! Yuck!
- Although the Stegosaurus dinosaur was over 9 metres long, its brain was only the size of a walnut.
- Humans get a little taller in space because there is no gravity pulling down on them.
- Because of the unusual shape of their legs, kangaroos and emus struggle to walk backwards.
- A hippopotamus may seem huge but it can still run faster than a man.
- Even if an analog clock is broken, at least it shows the correct time twice a day.
- Sneezing with your eyes open is impossible.
- The trickiest tongue twister in the English language is apparently “Sixth sick sheik’s sixth sheep’s sick”. Give it a try and see for yourself.
Stand with your back and heels against a wall or door and your legs straight. Drop a coin on the floor in front of you. Can you pick it up without falling over?
You get to keep the euro coin.
What we learned
It’s not possible.
In order to balance when you are standing your centre of gravity should be over your feet. When you are standing and bend forwards your centre of gravity starts to move forward too. Normally, you’d compensate by sticking your bum out behind you. But with the door there, this is impossible, so you tip over and Mr. Gorman gets to keep the money.
As we were looking at animals in our science books, we decided to pick our favourite animal and learn some more about them. We all stood at the top of the class and presented our research!
A few interesting facts taken from these projects:
Beavers use their tails to communicate
(Robert, Callum and Ronan)
There are over 300 breeds of pigs
(Jude and Tobi)
Chipmunks have large pouches in their cheeks for carrying food
(Shauna and Alexandra)
Ferrets have very bad breath!
(Wiktoria, Chloe and Katie)
Gray wolves are the biggest dogs in the wolf family
(Harrison, Ryan and Eddie)
Foxes have really good hearing and are nocturnal animals
(Alvin and Dario)
Wild chinchillas can be found in South America
(Leah and Ella)
Bats can eat all night!
(Darragh and Craig)
Male rabbits are called Bucks and female rabbits are called Does.
(Zofia and Sophie)
Last week we learned about how trees get their food!