Karakteristike morske vode
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Transcript of Karakteristike morske vode
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EKOSISTEM MORA
Izborna nastava za sedmi razred
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KARAKTERISTIKE MORSKE VODE
• SALINITET – označava količinu otopljenih soli u morskoj vodi
• prosječno 35 ‰ (35 grama soli na 1000 grama morske vode)
Najslanije je MRTVO MORE
Nalazi se između Izraela i Jordana
Zbog velike količine soli u njemu nema uslova za život.
Mrtvo more ima salinitet 240-300 ‰ .
Nalazi se 400 metara ispod nivoa mora
Na njemu je razvijen turizam
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Mrtvo morePlaža Qalya na Mrtvom moru
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Kupač u Mrtvom moru
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• TEMPERATURA – oko 0 stepeni na polovima a oko 30 stepeni u tropskim morima
• TEMPERATURA na velikim dubinama oko 0 stepeni
• Morska voda se ledi na -2 stepena
Jedrenjak pored ledene sante
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SVJETLOST
• Značajan ekološki faktor prodire do 200 metara dubine
• Na velikim dubinama nema svjelosti
Neobične ribe velikih dubina
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• STRUJANJA VODE
• Plima i oseka – dva puta dnevno
• PRITISAK
Povećava se sa dubinom – svakih 10 metara pritisak je veći za jednu atmosferu
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• Talasi
Nastaju djelovanjem vjetra; kod nas duva BURA, JUGO i MAESTRAL (sjeverozapadni vjetar – “kreće se za suncem”).
• Morske struje
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DA PONOVIMO...
• PITANJA:
1. KOLIKI JE SALINITET U MORU!
2. DO KOJE DUBINE PRODIRE SVJETLOST?
• ODGOVORI:
1. 35 ‰ 2. DO 200 METARA DUBINE.
• PITANJA
1. KOLIKO SE POVEĆAVA PRITISAK NA SVAKIH DESET METARA DUBINE?
2. NA KOJOJ TEMPERATURI SE MORSKA VODA LEDI?
• ODGOVORI
1. PO JEDNU ATMOSFERU.
2. NA -2 STEPENA.
EM1EM1