Next Wed (Jan. 17th), the students will have a test on our Strong and Stable Structures unit. Students should take the time to complete and review their notes in their Science duotangs (duotangs will be sent home this weekend). We will also take some time to review in class before the test next Wed. Please make sure the duotangs come back next week as they will be handed in for marking on Wed.
Your child can prepare for the science test by reviewing their duotang pages and answering/discussing the questions below:
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Understand the meaning of the following words: structure, strength, stability, and load.
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Name various natural structures and man-made structures.
- Understand the difference between tension, compression, torsion, and bending.
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In class, we did an experiment with cardboard tubes of different heights. What did we learn about the stability of tall objects by doing this experiment?
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In class, we tried to build towers out of 50 cue cards. What were two things that the winning group did well with their tower design to make it so tall and stable?
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In class, we did an experiment where we attempted to increase the stability of a regular cardboard tube. What did we learn about stability by doing this experiment? (How can you increase the stability of tall objects?).
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In class, we did an experiment with toothpicks and gumdrops. What did you learn about strength from that experiment? How can you reinforce, or make structures stronger? What are struts and ties? What force does each deal with?
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What properties of material do you need to consider when building the following: a) a car tire; b) a backpack; c) a roof for a house in Kanata, and d) a baseball bat.
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How can a structure be made strong and stable? Use words like load, struts, ties, cross-bracing, layers, pillars, posts, support beams, balanced, materials, tension, compression, torsion, large base/foundation, etc. in your answer.
In addition….here’s a great link to help differentiate between struts and ties, aside from what we have already done in class:
https://prezi.com/juftog3u3m9f/grade-3-science-ties-struts-and-structures/