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Mowjadaha dhawaaqa

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I can describe the movement of particles in a sound wave travelling through a solid, liquid or gas, and explain the relative speed of sound in each state of matter.

Muuji qoraalka
Sound waves are caused when objects vibrate, causing nearby air particles to vibrate as well. As a sound wave travels, each bit of air is vibrating parallel to the direction of wave travel, not travelling forwards. Sound is a longitudinal wave: the direction of vibration is parallel to the direction of energy transfer. Sound waves are faster in solids/liquids than gases; the particles are very close so vibrations are easily passed on. Sound waves are faster in solids than liquids; the strong forces between particles mean vibrations travel even faster.

Warqadda shaqada

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Imtixaannada

  1. 1. Mawjadda (wave), jihada tamarta lagu kala qaado waxay tahay __________ jihada safarka mawjadda.

    • 90° ka le'eg
    • Jawaabta saxda ah:isku mid ah
    • ka soo horjeeda

  2. 2. Mowjadka toosan (transverse wave) sida mowjadda biyaha, gariirku wuxuu ahaanayaa __________ jihada wareejinta tamarta.

    • Jawaabta saxda ah:90°
    • isku dhig ah
    • qiyaas leh

  3. 3. Ereyada soo socda, kee baa isku macno ah?

    • dardargelin (acceleration)
    • kala-saarid (distillation)
    • Jawaabta saxda ah:gariirad (oscillation)
    • gariir (vibration)

  4. 4. Ereyga ka mid ah kuwan soo socda ayaa qeexaya adke (solid) aan fududayn in la qalloociyo, la kala bixiyo, ama la isku buunsho?

    • cufan (compact)
    • la qallooci karo (flexible)
    • jajaban (fragile)
    • Jawaabta saxda ah:adag (rigid)

  5. 5. Bal, mid ka mid ah weedhahan ku saabsan walxaha (particles) ee adkaha, dareeraha iyo gaasaska ayaa sax ah?

    • Jawaabta saxda ah:Walxaha gaaska waxay isku dhufan karaan midba midka kale.
    • Walxaha dareeraha waxay ku jiraan hab go'an (fixed arrangement).
    • Walxaha aad bay ugu dhow yihiin dareeraha marka loo eego gaasaska.
    • Walxaha aad bay ugu dhow yihiin adkaha marka loo eego dareeraha.

  6. 6. Kee ka mid ah weedhahan ku saabsan moodellada sayniska (scientific models) waa kuwa sax ah?

    • Jawaabta saxda ah:Waxaa loo isticmaali karaa in lagu sameeyo saadaal (predictions).
    • Waa inay ku jiraan sawiro ama shay 3D ah.
    • Waa inay si dhab ah u ekaadaan waxa aan ka ognahay adduunka dhabta ah.
    • Waxaa laga tagi karaa faahfaahin qaar ah moodelka haddii ay ka fududeyso isticmaalkiisa.

  1. 1. Kee ka mid ah weedhahan ku saabsan xoogagga ka dhexeeya walxaha (particles) ee adkaha (solids), dareeraha (liquids), iyo gaasaska (gases) waa sax?

    • Ma jiraan xoogag koronto-jiidasho (electrostatic forces) oo ka dhexeeya walxaha dareeraha.
    • Jawaabta saxda ah:Soojiidashada ka dhexeysa walxaha adkaha ayaa ka xoog badan tan dareeraha.
    • Xoogagga is-celinta koronto-jiidashada (electrostatic repulsion) waxay had iyo jeer ku shaqeeyaan walxaha gaaska.

  2. 2. Mid ka mid ah kuwan soo socda ayaa sharxaya sababta mowjadaha dhawaaqa (sound waves) ugu dhaqsiin badan yihiin adkaha (solids) marka loo eego dareeraha (liquids)?

    • Jawaabta saxda ah:Marka hal walax (particle) oo adag ah la qaslo, waxyaabo badan ayaa la qaslaa.
    • Walxaha ayaa leh xawaare sare adkaha, sidaas darteed waxay isku dhacaan si joogto ah.
    • Walxaha ayaa aad isugu dhow adkaha, sidaas darteed waxay isku dhacaan si fudud.

  3. 3. Labo cirbixiyeen (astronaut) ayaa taagan Dayaxa iyagoo xidhan dharka hawada sare iyo koofiyadaha sababtoo ah ma jiro hawo. Caadi ahaan waxay isku hadlaan iyagoo isticmaalaya raadiyaha, laakiin raadiyadahoodu waa jajabeen. Sidee bay isula hadli karaan?

    • iyagoo si caadi ah u hadlaya
    • iyagoo si qaylo dheer u qaylinaya
    • Jawaabta saxda ah:iyagoo madaxahooda isku taabanaya markay hadlayaan
    • iyagoo madaxahooda dhulka saaraya, gudaha koofiyadahooda, markay hadlayaan

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