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In Science we have been learning about structures. The picture to the left is a natural structure. A natural structure is a structure that you can find untouched by any living organisms naturally. Some examples of natural structures are rocks, sand dunes, leaves, seashells and caves.
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This picture is one of the many examples of manufactured structures. A manufactured could be as simple as a piece of paper or your shirt. Manufactured structures are not found naturally, but manufactured structures do come from some natural structures. For example: Trees are natural structures and paper is made from it. Rocks are natural structures and some hold minerals that we may need for jewelry , cars, computers or metal trash cans. Sand that has been untouched is a natural structure and we make sand into glass.
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Imagine this, you are walking down the street and you see a brick wall. You decide to test to see if your friend was lying about mass structures. So you take a brick that was very loose out. You close your eyes thinking that it will fall and crush you. Nothing happens. You open your eyes to see that the brick wall didn't even move a centimeter. Realizing that your friend was telling the truth, you put the brick close to the wall and walk away.
Yes it's true that mass structures won't topple over if you take a piece out. Why? Well, because mass structures hold their own weight and don't need any support. Except for gravity.
Yes it's true that mass structures won't topple over if you take a piece out. Why? Well, because mass structures hold their own weight and don't need any support. Except for gravity.
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Please do not mistake this for a mass structure. This is a frame structure and believe me, it will not hold it's weight if you take out the beams from the bottom, middle, or top. Why not the top? It's there for a reason, to balance the weight! Frame structures could be your skeleton, a frame of a house, bridges or even the Eiffel Tower!
My class is doing a bridge project. You will find out more information about that in the Projects tab.
My class is doing a bridge project. You will find out more information about that in the Projects tab.
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Last but not least are shell structures. Shell structures are almost all around us, and we don't notice! Like helmets, a dome building or eggs. Shell structures have a curve to them and they are sometimes hard to break or easy to break. They are mostly hard to break though.
In class, we are writing our reflections on how our bridge went. Paij and I's bridge was too short so, our bridge didn't succeed holding the pop can. It was the lightest bridge but in order to win, it must be the lightest bridge and must hold a pop can. I won't be posting a picture of it because it is broken. It didn't snap in half but the string keeps on untying. I thought the bridge would have been successful if it was longer by 2 cm.
We have learned about different types of structures that have different functions, depending on what they are made for.
Tension and Compression are incomplete without each other because tension and compression work as a team. Tension pulls and compression pushes. Think of string, when you pull the piece of string it is tight. That is because tension and compression are working together. It might not look like there is compression, but it's there.
Mobile Joints are movable pieces of the structure like tires, elbows, knees and a rear view mirror.
Rigid Joints aren't movable like mobile joints are. For example, a brick or a skull because you can't twist a brick or skull.
Aesthetics is a way a structure looks. For example, I bet you would prefer a rainbow IPhone 5 over a white MP3 player.
Composite Materials are obviously a structure that is made out of more than one material like a door, computer, book and a bridge.
Wielding is when you melt two pieces of material together.
Brazing is when you form, fix or join materials by soldering with an alloy of copper and zinc at high temperature.
Adhesives are a substance used for sticking two pieces of materials together.
Functions are what the structure is meant to do or can do.
Forces are a force that could damage the structure, depending what the force is. (Bad Ending; Force: Tornado|Structure: House|Good Ending; Force: Rain|Structure: Rain Jacket)
Load is what the structure can carry. Like a truck can carry 1-5 people.
Design is like a blueprint of a structure.
Margin of Safety is the section of a structure that provides safety.
Properties is a characteristic of the structure.
Lamination is a layered structure.
Torsion is the twisting of an object.
Shear is when two parts of an object go opposite ways like scissors.
Tension and Compression are incomplete without each other because tension and compression work as a team. Tension pulls and compression pushes. Think of string, when you pull the piece of string it is tight. That is because tension and compression are working together. It might not look like there is compression, but it's there.
Mobile Joints are movable pieces of the structure like tires, elbows, knees and a rear view mirror.
Rigid Joints aren't movable like mobile joints are. For example, a brick or a skull because you can't twist a brick or skull.
Aesthetics is a way a structure looks. For example, I bet you would prefer a rainbow IPhone 5 over a white MP3 player.
Composite Materials are obviously a structure that is made out of more than one material like a door, computer, book and a bridge.
Wielding is when you melt two pieces of material together.
Brazing is when you form, fix or join materials by soldering with an alloy of copper and zinc at high temperature.
Adhesives are a substance used for sticking two pieces of materials together.
Functions are what the structure is meant to do or can do.
Forces are a force that could damage the structure, depending what the force is. (Bad Ending; Force: Tornado|Structure: House|Good Ending; Force: Rain|Structure: Rain Jacket)
Load is what the structure can carry. Like a truck can carry 1-5 people.
Design is like a blueprint of a structure.
Margin of Safety is the section of a structure that provides safety.
Properties is a characteristic of the structure.
Lamination is a layered structure.
Torsion is the twisting of an object.
Shear is when two parts of an object go opposite ways like scissors.