How Does It Happen?

Bucket Experiment

On Tuesday Hoiho class did Jacob's Wonder Brick. The Wonder was "How does water stay in a bucket when you swing it around?" First we got some people to swing the bucket around with the water in it.

Patrick and Aria got a bit wet because the bucket hit their leg when they were swinging it around.

The water stays in the bucket because the water swinging around in a circle gets a force, which makes the water want to fly outwards. If you swing the bucket around fast enough this force will be greater than the force of gravity so it won’t spill.

By Lawson and Sam

The amazing water and bucket trick!

On Tuesday, Hoiho went outside to do a "bucket" experiment. We filled the bucket up about half way with water, and if you spin the bucket around your head so your arm just touches your ear, the water will not fall out! 

The water stayed in the bucket because of centrifugal force. The bucket is what stops the water from flying outwards. Without the centrifugal force, you would expect for the water to fall out of the bucket because of gravity!

(Phew, thank goodness for centrifugal force!) But if you fill it to the brim, some of the water will come out while you are getting it up to speed!

By Finn, Patrick, and Josh.  

Reading To The Juniors

Library Bookweek Reading on PhotoPeach

More About Pulleys and The Extra Hand

Lots of machines have pulleys in them for example a cage that pulls you across a river.                           David

You use pulleys when you are sailing. It makes it easier to pull the sails up. You also use pulleys on cranes to lift up heavy objects like big containers. Also on flying foxes you connect the pulley to the wire. And with flags you use the pulley to raise the flag.                      Ben

You can find pulleys on cranes, garbage trucks with claws, big boats, sail boats, ski lifts, drawbridges, flag poles and bikes.              Margeaux

Today we had a big argument about where the weight goes when you pull the weight up with the pulley. First Ben said half the weight goes to the beam. It does, so he was right. The beam acts like another hand.                        Patrick

We learned that the beam supported half of the weight and our hands supported the other half of the weight.                    Josh

The weight will be half the weight that it actually is. This is because the beam is acting like another person so it is halving the weight between you and the beam.   Margeaux

Dome Strength

We brainstormed strong 3D shapes on the whiteboard . We said that an arch was a strong shape, then we talked about where your weight would go if we stood on an arch bridge. We had a lot of ideas about where our weight would go but we found out that it went down the curved sides towards the ground.Then we demonstrated with our arms how strong a dome is with Jonty and Mrs Bryant pushing the top of our hands down. It was fun experimenting with domes.

By Ruby and Kimberly

On Wednesday 4th Hoiho class did a science experiment. What we did is we got four empty three quarter eggshells. We put two eggshells close together at one end and two at the other end in a rectangle shape. Then we started to put blocks on.  

By Margeaux 

Some people thought that the eggshells wouldn’t hold three blocks. We stacked the third block on the empty 3/4 eggshells. Finn, Jacob, David

We put on the 4th block and there was a loud CRACK! Everyone yelled and I said "That was close". And one eggshell was cracked now. By Patrick 

Then we placed the tenth block on top of the ninth block. And the eggs didn’t break. Caleb

On the 14th block we heard a crack in an eggshell and it collapsed like the twin towers. By Margeaux

On Thursday we were writing like scientists about doing a forces experiment. First we did the title then the materials. After that we did the hypothesis. Then we did the procedures which took a while. Last of all we did the conclusion.

By Lawson and Sam

Add On In Parts

Covenant

Created using Pic Collage. http://pic-collage.com

Sent from my iPad

Rearranging and combining

Pentecost