BUILDING BRIDGES

On Friday we were engineering a bridge made out of play do and finding the weak and strong parts. We learnt about civil engineers and how they design bridges. We also read a book about different types of bridges before we designed and created our own.

This is what you need to build a bridge

• tooth picks
• a Lego car {To test if your car can hold the balance}
• play dough {to hold the tooth picks together}

We used square shapes to make our first bridge but it was not strong and it could not hold a lego car.

Then we use triangle shapes in our bridge and it was so so so strong! It held the car

Quiz 
What is the strongest shape?

• circle
• triangle
• square

BACK IN THE DAYS

Today we learnt about traditional Maori and British buildings. This is my compare and contrast map about the buildings.

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Earthquake Tower Challenge

Earthquake Tower Challenge

Today on Tuesday the 25th of july, we went to room 9 with Mrs sigamony for science intensive. In room 9 we were told that we need to follow the instruction to build the house and it was for us to build a tower made out of these:

• pins

• Cardboard base
• Straws
• Paper clips
• Metres of strings
• Sand 250g

Questions and Answers

During construction, how did you test the strength and stability of your structure? 250g of sand and put it on our straw tower.

During construction what strategies did you use to strengthen the weaker areas? Why? We could not strengthen our straw house because we didn’t have that much straws.

What are the strongest part of your building?why?

We had no strongest part on our straw house because the straws did not have much power to lift the sandbag.

What are the weakest parts of your building?Cardboard base Why? Because once you put the 250g of sand the base always moves a lot.

Where did you use your string in your structure? Why?

We never use the string because it will weaken the parts in the structure.

Where did you use the pins in your structure?We used it to make the tower straight. Why? So it could hold the 250g of sand.

what's the matter

so what’s the Matter?

Today we will be revising the three states of matter and learning more about atoms.

LI 1: We are learning to describe the three states of matter The three states of matter are solid, liquid and gas The particles in a solid can't move much and they are so tiny. It can hold it’s shape. The particles in a liquid can flow so they can move a little bit and they can mostly take the shape of a cup or a bucket and stuff that it is in. The particles in a gas are far apart from each other and they can also go any way they want to go if you open a widow the gas will go any way it wants.