SamuwarSakandare da kuma makarantu

Me cikin dare ne duhu: a kimiyya bayani

A wani batu na duniya shi ne lokacin da haske da kuma lokacin da yana da duhu. Wannan shi ne saboda da farko don mu main luminary - rãnã. Ta tsallake sama, canza hasken matakan. Kawai sa, akwai wani dare mai duhu, saboda rana ta kasa da sararin sama.

Ban sha'awa ra'ayi na zamanin d mutane

A zamanin da, mutanen sun dauka cewa da rana ne kadi a kusa da wannan duniya tamu da boyewa a baya da sararin sama. Babu wanda wani dogon lokaci ba ko bayar da shawarar cewa shi ne wannan duniya tamu kadi a cikin sararin sarari a kusa da duniya. Haka ya shafi watã. Sun kuma Moon da aka sanya a cikin saukakkun asalin: suka yi sujada, ya kawo kyautai, yabo songs da bikin. Amma zamanin da kimiyya ya tabbatar da cewa duk abin da yake sabanin hakan. Duniya - ba tsakiyar sararin samaniya, amma kawai wani kankanin bangaren shi, da kuma dalilin da ya sa dare ne duhu, ba a hade da wani allahntaka manifestations.

Menene Duniya ta juyawa da cewa shi rinjayar

Akwai biyu lokaci daya ƙungiyoyi da kuma ƙungiyoyi na duniya a sarari: orbital motsi a kusa da Sun kuma ma a kusa da kansa axis, kamar yaro ta saman. Wannan shi ne, a lokaci guda lokacin da duniya ke yawo a cikin sararin samaniya, shi revolves a kusa da kansa, da kuma hade da wadannan dalilai ne dalilin da ya sa dare ne duhu da rana - haske. Motsi tare da sarari suKe a sarari cikakken tare da cewa da Duniya ta axis ne karkata zuwa wannan sarari suKe a wani kwana na game da 66 digiri - shi ne dalilin da yanayi da kuma "dissimilarity". A sassa daban daban na Duniya, dangane da mataki na zafi haskoki haske, lokacin canji fall, hunturu, bazara da kuma bazara. Saboda haka, tsakiyar latitudes sau da yawa ziyarci duk hudu yanayi, a daban-daban digiri na tsanani (misali, a Italiya lokacin rani, kamar yadda da hunturu ne da yawa warmer fiye da a Moscow). A ekweita, mafi yawan abin da ke ƙarƙashin kai tsaye haskoki na rana a lokacin da rana kusa da kwana na 90 digiri, da ranar da yake a bangare kadan ya fi tsayi 12 hours.

Iyakacin duniya me sanyi, ko da yake rana akwai watanni shida?

A sandunan, hoto ne gaba ɗaya musamman hanya - rana ta haskoki fall sabõda haka sũ, slide da aka kusan gaba ɗaya nuna daga cikin surface, ba tare da tsayawa da kuma ba tare da barin zafi a shi, ko da rana da kuma dare a nan karshe kusan watanni shida kowanne. Me ne Arewa da Kudu iyakacin duniya - da coldest yankuna na duniya tamu.

Daban-daban tsawon rana da dare

The juyawa na duniya a kusa da rãnã, babban star gare mu, ma'anar da canza yanayi, kazalika da dare da rana. A siffar zobe siffar na duniya, da kuma heterogeneity na surface dukiya da haske haskoki nuna gaba da yi a iri-iri na sauyin yanayi a wadannan yankuna da wuri. Amma akwai kwanaki a lokacin da duk latitudes da iyakacin duniya zone zo a ranar da ciwon guda rarraba lokaci tsakanin bayyanannu, kuma duhu na rana - kwanakin bazara da kaka equinox. A wannan lokaci, a ekweita, wani abu zai ba da karami inuwa, kamar yadda rana bari ta haskoki a wani kwana na 90 digiri zuwa surface.

A ka'ida, me ya sa da dare ne duhu, duk abin da yake sarari. Amma shi ne ban sha'awa cewa akwai wani duhu dogon, kuma akwai ma kadan. Our Arewa Hemisphere ne halin da rage a cikin tsawon lokaci na dare na 21 Maris (vernal equinox) zuwa 23 ga watan Satumba (autumnal equinox), da kuma mataimakin versa - da tsawon dare faruwa a hunturu. A kudancin yammancin duniya halin da ake ciki shi ne mataimakin versa.

Da kuma yadda za mu bayyana wannan to your yara?

Bayyana wa yara da sabon abu daga abin da dare ne duhu, don rana ta Allah bai haskaka ba, ba quite gaskiya. Bayan duk, a gaskiya, da rãnã da yaushe haskakawa. Yana ba kunna ko kashe a kan wani ta yanke shawara a matsayin tebur fitila. Amma kuma magana game da Duniya ta matsayi a sarari, a kan malã'iku na abin da ya faru na haskoki da sauran wayo, wanda za a iya gane da makaranta-shekaru yara ba su da bukatar. Don yin wannan, iyaye ne mafi kyau ga zama mai kaifin kuma domin ya nuna a fili yadda wannan ya faru. Domin bayyana dalilin da ya dare ne duhu, shi wajibi ne ka san ko da yaro tare da biyu Concepts: abin da yake da rãnã da cewa shi ne duniya Earth. Make shi kyawawan sauki: zana biyu bukukuwa, daya - da kuma rawaya da haskoki (zahiri da Sun), da kuma sauran - da irin blue shaci nahiyar. Bugu da ƙari kuma, ba tare da faruwa a cikin rikitarwa terminology magana game da tsari, da kuma ya nuna ta hanyar da hasken rana tsarin model. Isar da shi a wani rawaya ball kuma karamin duniya, kuma idan zai yiwu, mafi alhẽri saya cikakken model ko a kan nasu don yin irin wannan, amma har yanzu tare da yaro. Don nuna cewa rana tsaye har yanzu, kuma mun gudu a, haddasa ya haskoki a sassa daban daban na duniya ba ko da yaushe samun. Sai yaro zai fahimci cewa dare ne duhu, saboda a wannan lokacin mun kau da kai daga gare shi, muka musanyata da rana, saboda haka yin magana, baya. Ga cikakken tsabta, za ka iya dare domin ya nuna wannan abun mamaki da yin amfani da wannan duniya da kuma tocila, wasa da muhimmancin da rana.

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