Wednesday, November 5, 2014

Structures & Forces

Open the above link and complete all four activities.  Post one thing you learned in each section.

Open and explore the above links.  Post three interesting things you learned in each video.  You may use point form.

Forces of Nature
Open the above link and explore some forces of nature: 

Tornadoes, Volcanoes, Hurricanes, and Earthquakes

Pick two and compare their effects on structures.


Unknown said...

Forces - What I Learned

When you slide something, it is called “shear”.By sliding I mean that Shear is a force that causes parts of a material to slide past one another in opposite directions.

When you are twisting something, it is called “torsion”.Torsion means that you, or nature, is twisting and turning something.In real life, some old bridges where not very stable so they started twisting.The bridges could not stand the force so they fell over.

Cast Iron is very easy to stretch because that iron is very fragile, it snaps without warning.


lsilvestri04 said...

In the “Forces Lab” I learned that torsion is the force that is used to bend objects.

In the “Loads Lab” I learned that temperature can affect structures by expanding or shrinking with the temperature. The temperature causes the beams and columns to change shape and push and pull on other parts of the structure.

In the “Materials Lab” I learned that by pulling or pushing steel very hard it can break.

In the “Shapes Lab” I learned that the way structures are made affects how strong the structure will be.

In the video I learned that triangles can help make a structure stronger. Second, a flat surface will be weaker. Thirdly, that is why bridges have triangles. (Because of the first reason).

In the website I learned that the steeper the slope, the further the truck. Secondly, if a truck has a parachute it won’t go as far. Finally, if a truck has more weight it goes further.

I chose earthquakes and tornadoes. They are different because tornadoes start in the air, have high winds, and suck things into the air. Earthquakes start far underground and make the ground vibrate. They also suck structures into the ground. ~Lucas