https://padlet.com/Science_Rocks/5bdpm6oghz3x GT Class 2019 en-us 2019-02-22 15:21:33 UTC 2023-04-01 14:57:40 UTC hello@padlet.com Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334172826 2019-02-22 15:23:30 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334172826 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334174010 Kevin, Lilly, Kaydence, Carson]]> 2019-02-22 15:25:35 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334174010 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334175264 Sahilo, Richie, Rolando]]> 2019-02-22 15:27:48 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334175264 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334176040 Diego, Lucas, Paul]]> 2019-02-22 15:29:15 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334176040 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334176876 Maddison, Dayanara, Natalia, Anthony ]]> 2019-02-22 15:30:50 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334176876 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334177667 Ma'kaio, Joie, Ny'Elle, Alberto]]> 2019-02-22 15:32:17 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334177667 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334180376
BACKGROUND
Bridges have fascinated people since the dawn of time when nature itself built many bridges in
the form of fallen trees over rivers or ancient icicle arches. As technology developed, people
began to build artificial bridges where nature had not. Advances in bridge design, engineering,
and construction have made many types of bridges possible and utilizing numerous materials.
Today, bridges can be of the arch, beam action, cable stay, suspension, or truss type. Materials
used throughout history include wood, masonry, cast iron, wrought iron, concrete, steel,
reinforced concrete, alloy and silicon steel, pre-stressed concrete, carbon fiber, and aluminum.
PURPOSE
To use math and science to implement engineering concepts in the design and construction of a
model bridge from your own plans that will carry a maximum load while using as few craft-sticks
as possible; and, to develop neatness, craftsmanship and creativity.]]> 2019-02-22 15:37:21 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334180376 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334182870

http://www.42explore.com/bridge.htm http://pages.jh.edu/~virtlab/bridge/truss.htm
https://www.usbr.gov/lc/region/programs/bridgebuilding/Presentation.pdf]]> 2019-02-22 15:41:33 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334182870 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334187048 1. When the students arrive, they will be:
A. Registered with their team name and school
B. The bridge will be measured for length, width, height, and weight. Any bridge not
meeting the requirements will be DISQUALIFIED from winning awards.
C. If the students consent, a team picture will be taken with the students holding their
bridge. The picture will be used for the aesthetic grading.
2. The Bridges will tested tested at one of three testing stations, depending on the length of
the bridge. >12 inches, >18 inches, or >36 inches. The bridge will be tested in the
highest possible category, for example a bridge of length 20 inches would be tested in
the >18 category, and a bridge of 40 inches in the highest category, >36. ALL bridges
must be at least 12 inches long to be tested, as this is a requirement of the testing
apparatus.
3. The bridges will then be tested by loading the bridge with weight from the two loading
hooks as described in detail below.
4. Each team will receive a certificate stating their team name and scaled bridge load result.
5. The winners will be announced the following day.]]> 2019-02-22 15:48:54 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334187048 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334187788 Materials:
POPSICLE STICKS
● Cut / notched at any angle.
● Sanded to any width.
● Bent or curved (sticks may be soaked in water ONLY to curve).
● Marked on the face for decoration using only markers, crayons and/or colored pencils.
● Sticks may NOT be altered in the following ways: Soaked in any material besides water;
painted or coated except with markers, crayons or colored pencils on the stick for
decoration only.
ELMER’S WHITE GLUE
● ONLY water soluble white Elmer’s glue can be used as an adhesive.
● Yellow wood glue, or glues containing resin adhesives or other cement binders are NOT
allowed
DIMENSIONS
● Minimum 3 inches tall
● Minimum 3 inches wide]]> 2019-02-22 15:50:13 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334187788 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334188623 Bridge must leave space for the testing apparatus: a flat metal strip that will sit on the base of
the bridge and serve as the loading board. The board distributes the weight along the length of the bridge. The board has a groove running the length of the board; adjustable screws will be inserted at two points through this board to attach the two loading hooks to the bridge, these hooks will bear the test weight.
If students wish to build a curved bridge or bridge that CANNOT accommodate a straight loading platform, the students must leave holes in the bottom of the bridge to allow attachment of screws and hooks. ]]> 2019-02-22 15:51:35 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334188623 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334201108 2019-02-22 16:12:23 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334201108 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334202962 2019-02-22 16:15:56 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334202962 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334204155 Strongest Bridge of each length: This will be scaled load tested, if a bridge that weighs 100
grams holds 400 grams, then the scaled load strength of the bridge is 400g/100g = 4 g/g.]]> 2019-02-22 16:18:05 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334204155 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334205267 Most Beautiful Bridge: to be chosen by a panel of three judges
Most Creative: to be chosen by a panel of three judges]]> 2019-02-22 16:20:07 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/334205267 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336528431 2019-02-28 17:35:09 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336528431 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336529455 2019-02-28 17:36:25 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336529455 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336530028 2019-02-28 17:37:19 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336530028 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630487 2019-02-28 20:24:27 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630487 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630721 2019-02-28 20:24:56 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630721 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630918 2019-02-28 20:25:24 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336630918 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336631167 2019-02-28 20:25:55 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336631167 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336631435 2019-02-28 20:26:25 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/336631435 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339323919 2019-03-08 14:56:00 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339323919 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339324277 2019-03-08 14:56:42 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339324277 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339325336 2019-03-08 14:58:31 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339325336 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339325843 2019-03-08 14:59:17 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339325843 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339326077 2019-03-08 14:59:42 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339326077 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339327433 2019-03-08 15:02:10 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339327433 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339327765 2019-03-08 15:02:50 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339327765 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339328276 2019-03-08 15:03:47 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339328276 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339348236 2019-03-08 15:42:27 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339348236 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339348858 2019-03-08 15:43:55 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339348858 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339349167 2019-03-08 15:44:28 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339349167 Science_Rocks https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339349787 4th Grade GT Class 2019]]> 2019-03-08 15:45:52 UTC https://padlet.com/Science_Rocks/5bdpm6oghz3x/wish/339349787