HONOURABLE MENTION

#### What bridge is the best to stop a natural disaster

We tested to see what shape bridge is the best to withstand a natural disaster.

### Hypothesis

We think that the triangle would be the best shape to survive a natural disaster becasue since the two sides that intersent at te top of the polygon are ascending then immediatly descending, any sort of liquid would go over and them straight down. Another shape that could be good for a natural disaster is a rectangle. This is because the 4 vertices that are conected give the shape a decent amount of strength to the shape, thus making this object harder to push or pull. Combining this shape with a triangle would make it both resistant to water and air. Giving a shaoe the strength of a rectangular prism and a triangular prism/pyramid would make it harder to destroy from a natural.

### Research

Natural disasters can be made by many reasons. For example: soil erosion,  the movement of tectonic plates or even seismic activity. A tsunami is made when the tectonic plates shift under the surface of a sea. A surge of water climbs over the hill made by the movment of the tectonic plates. Tornados are made when cold air and warm air infterfere with each other. The colder and denser air is pushed over the warm air usually creating thunder. The warm air rises, this causes and updraft. When the updraft touches the ground, it becomes a tornado. Finally, hurricanes are made when the water is warm, and when there is moist, warm air in the sky.

### Variables

Variables to keep the same:

The variables to keep  the materials used such as, cardboard, and bridges.

Variable to change:

The variable to change would be the main materials to make the disasters as not all disasters have the same effects. Meaning that we would also have to change the natural disasters.

### Procedure

Well, For our procedure we are going to use 5 types of bridges, And use recreational natural disasters, The ones we have picked are tsunami, hurricane and a tornado.
1.  (Tsunami) First we will put one bridge in, Then we use cardboard and make a              huge wave which uses pressure on the bridge, and last we check the results!
2. (Hurricane) To start off, we would use a hair dryer and a shower hose to show the water and wind affect in action!
3. (Tornado) For this experiment we would use a hair dryer to showcase the strong winds that come with a tornado.

### Observations

During the experiment, The Rectangular bridge was obviously a well built structure that could not be destructed by a tornado and hurricane. Although the railing of the rectangular bridge was severely damaged due to a tsunami.
The square bridge was made primarily out of cardboard. Therefore, it was more deprived of strength against water. It was also affected by a tornado demonstrating that the cuboid structure would be the worst shape to make a bridge.
For the triangular structure it was successful and did work to becoming a better bridge to withstand any natural disaster. This represented that our hypothesis was indeed correct.

### Conclusion

In conclusion we learnt that the triangle would be the best shape to use in case of a natural disaster. Although, realistically speaking the speed and velocity at which the natural disaster is traveling it could destroy anything whether it was titanium or cardboard.Although, it was interesting to learn about what shape would withstand a natural disaster best.

### Application

Hello, Our names are Arundeep Gill & Gurlove Deol. Our project question is "Which bridge can last the most to a natural disaster?".

We wanted to do this project because we love destruction, and we enjoy making things. We hope you enjoy our project! .

### Sources Of Error

In our project, there can be minor errors such as the natural disasters not being right. Because you could throw matierals such as water in the wrong way.

### Citations

We used our own knowledge on natural disasters and geometry to come up with bridges that we can use to stop natural disasters from occuring!

### Acknowledgement

We would like to say thank you to our parents for helping us when we did not understand some parts of the experiment. They also told us how we could recreate the disasters.