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Milicsiga iyo nuugista codka

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Waxaan sharxi karaa arrimaha saameeya sida walax ama shay u milicsado ama u nuugo codka, iyo hababka lagu yareeyo buuqa.

Hordhac

Hordhac: Darsigani wuxuu ku saabsan yahay sida codku u milicsado ama u nuugo marka uu la kulmo walxo kala duwan. Kahor intaadan bilaabin, waxaa muhiim ah inaad xusuusato sida codka loo sameeyo iyo sida uu u safro hawada, maadaama ay tani kaa caawin doonto inaad fahanto waxa darsigu ku saabsan yahay.

Muuji qoraalka
Sound reflects from hard surfaces. An echo is when a sound is heard again after reflecting and travelling back. Smooth, flat surfaces help to produce echoes. Irregular surfaces reflect sound in many directions, spreading it out. The particles of harder materials are held together by stronger forces so sound waves can’t make them vibrate much. Soft surfaces absorb a lot of sound because sound waves transfer energy by making the particles in them vibrate. Noise (unwanted sound) can be reduced by using soft materials to absorb it or hard materials to reflect it.

Warqadda shaqada

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Imtixaannada

  1. 1. Ereyga ka mid ah kuwan soo socda ayaa qeexaya dhaqdhaqaaq isku soo noqnoqda ee dib iyo hor?

    • faakuum (vacuum)
    • Jawaabta saxda ah:gariir (vibration)
    • fayoolin (violin)
    • danab (voltage)
    • cod heerkiisa (volume)

  2. 2. Ereygan soo socdaa midkee ayaa loo isticmaalaa in lagu qeexo waxa ay ka samaysan yihiin adkaha (solids), dareeraha (liquids) iyo gaasaska (gases) oo dhan?

    • Jawaabta saxda ah:walxaha (particles)
    • qaybaha (partitions)
    • jajabyada (parts)
    • meelaha sare (pinnacles)
    • barafyada (popsicles)

  3. 3. Durbaan (drum) ayaa laga garaacayaa dhinac ka mid ah qolka. Waxay soo saartaa dhawaq (sound) kaas oo gaaraya dhinaca kale ee qolka. Sidee ayuu dhawaqgu u safraa qolka oo dhan?

    • Hawadu waxay ka safartaa dhinac ka mid ah qolka ilaa dhinaca kale.
    • Qaybaha dhawaqa (sound particles) waxay ka safraan dhinac ka mid ah qolka ilaa dhinaca kale.
    • Dhawaqgu wuxuu dhex maraa qaybaha hawada (air particles) laga bilaabo dhinac ka mid ah qolka ilaa dhinaca kale.
    • Jawaabta saxda ah:Qaab (pattern) ah dhaqdhaqaaq soo noqnoqda ayaa ka safraya dhinac ka mid ah qolka ilaa dhinaca kale.

  4. 4. Waa maxay magaca habka marka mawjadu (wave) ka soo booddo (bounces) dusha sare?

    • nuugista (absorption)
    • kala-baxa (diffraction)
    • Jawaabta saxda ah:milicsiga (reflection)
    • jajabinta (refraction)
    • gudbinta (transmission)

  5. 5. Waa maxay magaca loo yaqaan habka marka mawjadu ay lumiso tamarteeda ka dib markay gasho walax, sidaas darteed aysan dib uga soo bixin ama aysan si buuxda u dhex mari karin?

    • Jawaabta saxda ah:nuugista (absorption)
    • kala-baxa (diffraction)
    • milicsiga (reflection)
    • jajabinta (refraction)
    • gudbinta (transmission)

  6. 6. Markii mowjadda dhawaaqu ay dhex marto hawada, waxay keentaa in hawadu wax yar kululaato. Kee ka mid ah weedhahan soo socda ayaa sharxaya sababta taas u dhacda?

    • Mowjaddu waxay isticmaashaa qaybaha hawada (air particles).
    • Mowjaddu waxay abuurtaa qaybo badan oo hawada ah.
    • Jawaabta saxda ah:Mowjaddu waxay kordhisaa dhaqdhaqaaqa aan kala go' lahayn ee qaybaha hawada.
    • Mowjaddu waxay yaraysaa dhaqdhaqaaqa aan kala go' lahayn ee qaybaha hawada.

  1. 1. Kee ka mid ah weedhahan soo socda ayaa sax ah?

    • Jawaabta saxda ah:Marka shay uu dhawaaqa nuugo, qaybihiisa ayaa si badan u gariiraya.
    • Jawaabta saxda ah:Agabyo jilicsan ayaa ka nuuga tamar badan oo ka timaadda mowjadaha dhawaaqa marka loo eego agabyo adag.
    • Marka mowjadda dhawaaqu ay gasho adke, waxay ku safartaa meelaha bannaan ee u dhexeeya qaybaha.

  2. 2. Qof baa ku garaacay durbaan (drum) qol dhexdiisa. Marka uu joojiyo garaacista durbaanka, ma maqlo dhawaqa mar dambe. Kee ka mid ah weedhahan soo socda ayaa sharxaya sababta ay tani u dhacdo?

    • Tamarta dhawaqa waa la isticmaalay (used up).
    • Jawaabta saxda ah:Mawjadda dhawaqa waxaa nuugay (absorbed) derbiyada iyo walxaha kale.
    • Dhawaqa waxaa hadda laga maqli karaa meel kale halkii.
    • Jawaabta saxda ah:Tamarta dhawaqa waxay u wareegtay kaydka kulaylka (thermal store).

  3. 3. Qof ayaa taagan 5 mitir u jira gidaar banaanka ah oo wuxuu sacabka isku garaacaa. Wuxuu maqlaa dhawaq soo noqonaya (echo). Marka uu qofku maqlo dhawaqa soo noqonaya, intee ayay u socotay mowjadda codka (sound wave)?

    • 0 m
    • inta u dhaxaysa 0 m iyo 5 m
    • 5 m
    • Jawaabta saxda ah:10 m
    • 20 m

  4. 4. Waa kee mid ka mid ah astaamaha dusha sare ee u oggolaanaya inay soo saarto dhawaq-celin (echo) cad?

    • Jawaabta saxda ah:siman (flat)
    • qallafsan (rough)
    • Jawaabta saxda ah:jilicsan (smooth)

  5. 5. Mid ka mid ah kuwan soo socda ayaa ah qeexida saxda ah ee 'buuqa (noise)'?

    • dhawaaq qaylo ah
    • dhawaaq joogto ah
    • Jawaabta saxda ah:dhawaaq aan la rabin
    • dhawaaq istaaga oo bilaabma

  6. 6. Qolka duubista muusikada, dhawaqyada (echoes) badanaa lama rabo. Waa kuwee hababka ugu waxtarka badan ee yareeya dhawaqyada qolka?

    • dhulka alwaax ah
    • Jawaabta saxda ah:roogag saaran dhulka
    • Jawaabta saxda ah:gidaarada lagu daboolay buufin jilicsan (soft foam)
    • gidaarada lagu daboolay saxariir bir ah (metal sheets)

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