## Science Structures And Forces Unit Summative Assessment Criterion B And C Summary

The Natural world affects us in many ways -good and bad- including things like gravity which keeps us on the floor and prevents us, and our objects from floating around like headless chickens. But like all good things, nature as a bad side as well, these things include hurricanes which obviously destroy building and bridges. Things like tsunamis and earthquakes also contributed to the destruction of many structures.

Doing experiments can test the dangers of the natural environment and what damage they will inflict on different structures. Once we know what the environment can do, we can create structures that counteract the power of nature. Essentially, the more we know about the dangers of the world, the more we can do to defend against them.

We created a test which shows which height of I-Beam (5cm, 10cm, 15cm) can stand up to a significant amount of wind and weight for 30 seconds. There results of the test shows that the 5cm I-Beam is the most effective due to the fact that since it’s profile is so small, the wind is not able to use all it’s power on it. Also, the weight is more stable when the weakness (the long stick in the middle) is less exposed to the elements.

We first did a trial run of the experiment to figure out all the problems and details that we didn’t specify in the Criterion B method section. We improved our test as we went on so once we completed the first trial, we had a good idea of how we wanted our experiment to look. I researched about different ways wind and weight can affect a structure and how people now are counteracting them. Since me and Roger’s experiments were very similar, with us both using the same I-Beam, we took turns in testing/using the I-Beam. When I was testing, he was improving his method. When he was testing, I was recording the data and writing up extra notes.

## HWOO Tuning in

Before this activity, we drew what we thought was a system and described it. My group chose the system of a hamburger and how it is made. Then, Using a chatterbox, we talked about different aspects of the system we drew on Friday. The chatterbox worked because on each side there was a question that we had to answer explain the answer. Here is the link.