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Waxaan sharxi karaa sababta codka uu uga sii aamusnaan fogaan, iyo sababta mowjadaha codka ugu dhakhsaha badan adkaha iyo dareeraha marka loo eego gaasaska, laakiin aan gabaad ka dhex mari karin.

Hordhac

Soo dhawoow darsigan. Darsigani wuxuu qayb ka yahay cutubka 'Sound, Light and Vision' (Dhawaaq, Iftiin iyo Arag), wuxuuna ku saabsan yahay sida dhawaaqu u safro oo uu isu beddelo. Kahor intaadan bilaabin, waxaad hore uga fahantay in dhawaaqu yahay mowjad (wave) oo uu u baahan yahay walax uu ku dhex maro, sida hawada ama biyaha.

Muuji qoraalka
Sound spreads out and becomes quieter (lower amplitude vibrations) as it travels. Sound travels through a medium by vibrations being passed on between the particles of the medium. Sound travels faster through liquids than gases as the particles are closer so vibrations can be passed on more easily. Sound travels fastest through solids due to strong attractive forces between particles so many vibrate when one does. Sound waves are caused by vibrations of particles so sound can't travel through a vacuum (where there are no particles).

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Imtixaannada

  1. 1. Shay shidmay ayaa sameeya dhawaq. Kee ayaa si sax ah u qeexaya baaxadda gariirka (amplitude)?

    • heerka dhawaaqa uu sareeyo
    • xawaaraha shayga gariiraya
    • tirada gariirka ee ilbiriqsi kasta
    • Jawaabta saxda ah:inta ugu fog ee shaygu ka dhaqaaqo meeshiisii hore

  2. 2. Shay shidmaya ayaa sameeya dhawaq. Kee ka mid ah kuwan soo socda ayaa si sax ah u qeexaya isbeddelka dhawaqa la maqlo haddii baaxadda (amplitude) gariirku hoos u dhaco?

    • Codka dhawaqa ayaa kordha.
    • Jawaabta saxda ah:Codka dhawaqa ayaa hoos u dhaca.
    • Heerka (pitch) dhawaqa ayaa kordha.
    • Heerka (pitch) dhawaqa ayaa hoos u dhaca.

  3. 3. Mid ka mid ah kuwan soo socda ayaa si sax ah u qeexaya dhaqdhaqaaqa walxaha hawada (air particles) marka mawjada dhawaaqa (sound wave) ay dhex marto hawada?

    • Waa la qaadaa iyaga oo la socda mawjada dhawaaqa.
    • Jawaabta saxda ah:Waxay gariiraan hor iyo dib oo ma safraan.
    • Waxay ka fogaadaan meesha dhawaaqu ka yimid.

  4. 4. Adkaha, dareeraha iyo gaasaska waxay ka kooban yihiin walxaha yaryar (particles). Kee ka mid ah kuwan soo socda ayaa qeexaya habka ay u kala fog yihiin ama dhaqdhaqaaqa walxaha yaryar ee adkaha?

    • Jawaabta saxda ah:Waxay aad isu dhow yihiin.
    • Waxay isku wareegi karaan midba midka kale.
    • Waxay si adag ugu xiran yihiin walxaha ku xiga.
    • Waxay ku gariiraan meelo go'an.

  5. 5. Mid ka mid ah kuwan soo socda ayaa qeexaya habka ama dhaqdhaqaaqa walxaha (particles) ee dareeraha (liquid)?

    • Jawaabta saxda ah:Waxay isku wareegi karaan midba midka kale.
    • Waxay si adag ugu xidhan yihiin walxaha ku xiga.
    • Waxay ku gariiraan meelo go'an.
    • Waxay aad uga fog yihiin marka loo eego adkaha (solids).

  6. 6. Mid ka mid ah kuwan soo socda ayaa qeexaya habka ama dhaqdhaqaaqa walxaha (particles) ee gaaska?

    • Jawaabta saxda ah:Waxay isku wareegi karaan midba midka kale.
    • Waxay ku gariiraan meelo go'an.
    • Waxay si adag ugu xiran yihiin walxaha ku xiga.
    • Waxay aad uga fog yihiin marka loo eego dareeraha (liquids).

  1. 1. Ereygaas ka mid ah ayaa macneheedu yahay 'meel bannaan oo gebi ahaanba madhan oo hawada ah'?

    • continuum
    • tallada (vaccine)
    • vacuole
    • Jawaabta saxda ah:vacuum
    • vanadium

  2. 2. Ereygaas ee soo socdaa midkee macnihiisu yahay ‘walax uu mawjadu dhex maro’?

    • yar
    • dhexdhexaad
    • Jawaabta saxda ah:dhex (medium)
    • dhexe (median)
    • weyn

  3. 3. Intee ka mid ah kuwan soo socda ayaa dhawaaqu mari karaa: vacuum (meel faaruq ah), gaas, dareere, adke?

    • midna
    • 1
    • 2
    • Jawaabta saxda ah:3
    • 4

  4. 4. Maxaa ka mid ah kuwan soo socda oo sharxaya sababta uu dhawaqa ugu safro xawaare kala duwan marka uu dhex maro adkaha, dareeraha iyo gaasaska?

    • Mawjadaha dhawaqa waxay si ka dhakhso badan u dhex mari karaan farqiga weyn ee u dhexeeya walxaha gaasaska.
    • Jawaabta saxda ah:Gariirka waxaa si dhakhso ah loo gudbiyaa haddii walxuhu isku xidhan yihiin.
    • Gariirka waxaa si dhakhso ah loo gudbiyaa haddii walxuhu ay isku wareegi karaan.

  5. 5. Shay shidmaynaya ayaa sameeya dhawaq. Kee ka mid ah kuwan soo socda ayaa si sax ah u qeexaya isbeddelka dhawaqa la maqlo marka mowjadda dhawaqu sii fogaanayso?

    • Jawaabta saxda ah:Dhawaqu wuu sii yaraanayaa (ka sii aamusan).
    • Baaxadda gariirka walxaha ayaa kordheysa.
    • Tamarta mowjadda dhawaqa waxaa la wadaaga qaybo badan oo walxo ah.
    • Tamarta mowjadda dhawaqa waxaa la wadaaga qaybo ka yar oo walxo ah.

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