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Qaabka polymers

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I can give examples of polymers and explain how the properties of polymers depend on their structure.

Hordhac

Casharkani waa qayb ka mid ah mawduuca "Maaddooyinka" (Materials), waxaanu ku qabsanaynaa qaab-dhismeedka polymers-ka. Waa inaad hore u taqaanid fikradda guud ee polymers-ka iyo sida ay uga duwan yihiin maaddooyinka kale.

Muuji qoraalka
Polymers are made from small molecules called monomers that join together to form very long chains of atoms. Some polymers have high melting points because their molecules are hard to separate. Polymers can be made synthetically, but some also exist naturally. A plasticiser added to a polymer gets between polymer molecules and allows them to move over each other more easily. Cross-links between polymer molecules can make a polymer harder and less flexible.

Warqadda shaqada

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Imtixaannada

  1. 1. Waa kuwee saddexda astaamood ee soo socda ee ka dhigaya polymers kuwo waxtar u leh samaynta dhalooyinka biyaha caagga ah?

    • jajab badan (brittle)
    • Jawaabta saxda ah:adkaysi leh (durable)
    • jilicsan (flexible)
    • dahaar (insulator)
    • fudud (lightweight)

  2. 2. Balastikku waa polymers, laakiin dhammaan polymers ma aha balastik. Kee ka mid ah alaabooyinkan soo socda ayaa loo tixraacaa polymers?

    • naxaas (brass)
    • fiiberka kaarboonka (carbon fibre)
    • galaas (glass)
    • Jawaabta saxda ah:caag (rubber)
    • birta (steel)

  3. 3. Waa kee mid ka mid ah sifooyinka caagga (rubber) ee ka dhigaya mid waxtar u leh samaynta xargaha caagga ah (rubber bands)?

    • jajab badan (brittle)
    • adkaysi leh (durable)
    • Jawaabta saxda ah:fudud oo la qalloocin karo (flexible)
    • gaar ka ah korontada (insulator)
    • fudud (lightweight)

  4. 4. Ka fikir baraf, biyo, iyo uumiga biyaha. Atamka iyo molecules-ka waxaa isku haya siyaabo kala duwan iyo xoog kala duwan. Maxaa dhacaya marka heerkulka karkarinta (boiling point) biyuhu isu beddelaan uumiga biyaha?

    • atamku waxay ku wareegaan midba midka kale gudaha molecules-ka biyaha
    • xidhiidhada kiimikada (chemical bonds) ee molecules-ka biyuhu way daciifaan
    • Jawaabta saxda ah:molecules-ka biyuhu waxay leeyihiin tamar ku filan oo ay ku gaadhaan xoogagga is dhexeeya
    • molecules-ka biyuhu waxay ku wareegaan midba midka kale in ka badan marka ay dareere yihiin

  1. 1. Polymers waxaa lagu matali karaa moodello. Liis ee kee si sax ah u sharaxaya sawirka leh saddex moodel oo polymer ah, bidix ilaa midig?

    • polymer laamo leh; polymer leh plasticiser; polymer isku xiran
    • polymer laamo leh; polymer isku xiran; polymer leh plasticiser
    • Jawaabta saxda ah:polymer isku xiran; polymer leh plasticiser; polymer laamo leh
    • polymer isku xiran; polymer laamo leh; polymer leh plasticiser
    • polymer leh plasticiser; polymer isku xiran; polymer laamo leh

  2. 2. Isku-xidhka kiimikada (chemical bond) waa xoog adag oo isku haya atamka gudaha isku-dhafka. Isku-xidhka kiimikada wuxuu u baahan yahay tamar badan si loo jebiyo. Kee ka mid ah weedhahan soo socda ayaa sax ah?

    • Polymers-ka, xoogagga soo jiidashada waxay la mid yihiin isku-xidhka kiimikada.
    • Jawaabta saxda ah:Polymers-ka, xoogagga soo jiidashada way ka daciif yihiin isku-xidhka iskutallaabta (cross-links).
    • Polymers-ka, xoogagga soo jiidashada waxaa daciifiya plasticisers-ka.
    • Polymers-ka, xoogagga soo jiidashada waxaa daciifiya laamaha (branches).

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