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http://www.history.com/topics/exploration/vasco-da-gama

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Mariana Juarez

on 1 February 2017

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Transcript of http://www.history.com/topics/exploration/vasco-da-gama

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paragraph 3
The first bridges were simply imported beams, like flat stones or tree trunks laid across a stream. For valleys and bigger channels such as, in East Asia and South America, where examples can still be found- ropes made of various grasses and vines. The Romans back in the day began organized bridge building to help their military campaigns. Engineers and skilled workmen formed guilds that spread and exchanged building ideas and principles. Taking a trip to the renaissance. Fine bridges sporadically appeared, however. Medieval bridges are particularly are noted for the ogival, or pointed arch. Nowadays we use materials such as steel, iron, and perhaps stone. These are much stronger due to the fact that we need them to withstand many tons of cars and people. Who walk across every day and many years to come.
paragraph 2
ll major bridges are built with the public's moAney. There fore bridge designs serves the public interest has a three fold goal. To be efficient, economical, and as elegant as is safely possible. Efficiency is reducing materials while increasing performance. Economy is reducing the costs of construction and maintenance while retaining efficiency. Finally, elegance is a symbolic or visual showing personal expression of the designer, although elegance has always been controversial.

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My experiment went well. All I expected happened even though I was a bit worried it would break. My bridge never bent it always stayed in shaped. My hypothesis was correct. I also learned that small things matter they make big differences in our everyday life's. Bridges help us get from one place to another. And if well built it getting the job done. With one little difference or mistake it can all go wrong. Let's give the thanks to engineers who help us with big projects like this. Let's give thanks to the 1st person who came up with the idea of the bridge.
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My results came out very well but hoped much more. In the begging I had only one block which equalled 35lbs on the bridge. I added 2 more blocks which added up to 105lbs. Adding another 2 equalled 175lbs. I was liking my results a lot. I had in mind to test my bridged until it reached to at least 500lbs but I was not available to find more cinder blocks. I took the blocks off and Asked 3 of my family members to get on it. I first added the 1st person weighing 175lbs. Then I told the 2nd person to get on weighing at 128lbs. Then I asked the 3rd person to hop on weighing at 110lbs. I wanted more weight to reach my goal which was to at least hold 500lbs. So I got on weighing 93lbs. Without the bridge breaking it added up to a total of 506lbs!!
paragraph 4
I first got a 2 x 4 piece of wood. Then I cut the piece of wood down to the desired length. Next I got a another piece of wood I sketched an arch and later cut it. Then I repeat the last step once again. Using a other small pieces at the bottom for support. Finally I assembled the pieces together and nailed everything down in place. Now I will begin the test. I placed a one cinder block that weight about 35lbs. It seemed to handle it well. Then I decided to take a little risk and added 2 more blocks. I wanted to add 2 more blocks. In total I used only 5 cinder blocks.
Designs of bridges vary depending on the function. The nature of the terrain where the bridge is constructed and anchored, the material used and the funds available to build it. In my project I will be building a bridge and will be observing how much weight it can sustain.
The first bridges were simply imported beams, like flat stones or tree trunks laid across a stream. For valleys and bigger channels such as, in East Asia and South America, where examples can still be found- ropes made of various grasses and vines. The Romans back in the day began organized bridge building to help their military campaigns. Engineers and skilled workmen formed guilds that spread and exchanged building ideas and principles. Taking a trip to the renaissance. Fine bridges sporadically appeared, however. Medieval bridges are particularly are noted for the ogival, or pointed arch. Nowadays we use materials such as steel, iron, and perhaps stone. These are much stronger due to the fact that we need them to withstand many tons of cars and people. Who walk across every day and many years to come.
The first bridges were simply imported beams, like flat stones or tree trunks laid across a stream. For valleys and bigger channels such as, in East Asia and South America, where examples can still be found- ropes made of various grasses and vines. The Romans back in the day began organized bridge building to help their military campaigns. Engineers and skilled workmen formed guilds that spread and exchanged building ideas and principles. Taking a trip to the renaissance. Fine bridges sporadically appeared, however. Medieval bridges are particularly are noted for the ogival, or pointed arch. Nowadays we use materials such as steel, iron, and perhaps stone. These are much stronger due to the fact that we need them to withstand many tons of cars and people. Who walk across every day and many years to come.
The first bridges were simply imported beams, like flat stones or tree trunks laid across a stream. For valleys and bigger channels such as, in East Asia and South America, where examples can still be found- ropes made of various grasses and vines. The Romans back in the day began organized bridge building to help their military campaigns. Engineers and skilled workmen formed guilds that spread and exchanged building ideas and principles. Taking a trip to the renaissance. Fine bridges sporadically appeared, however. Medieval bridges are particularly are noted for the ogival, or pointed arch. Nowadays we use materials such as steel, iron, and perhaps stone. These are much stronger due to the fact that we need them to withstand many tons of cars and people. Who walk across every day and many years to come.
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A bridge is a structure
built to span physical obstacles without closing
underneath a bidy of water. Sych as a valley ot road
for the purpose of giving a passage. There are many different
situations. Designs of bridges vary depending on the function.
The nature of the terrain where the bridge is consturcted and anchored,
the material and the funds avalible tu build it. In my project I will
be building a bridge and will be observing how much weight it can sustain.
My hypothesis is how much weight the bridge can hold. In this case
I think my bridge will be able tomat least hold 550lbs.
* wood
*nails
*saw
Hypothesis: I think that my
bridge will sustain 100lbs
Problem: If I build a bridge,
then I will be putting weight on it to see
how much weight it can sustain
Control: Is the design of the bridge.
Variable: The amount of weight I will
be placing on my bridge.
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