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ID number:941810
 
Author:
Evaluation:
Published: 29.03.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Siltuma avoti
Par siltuma avotiem sauc parādības, kas izraisa siltumu dabiski vai mākslīgi.
Siltuma avotu rašanās
Pirmie ugunskuri uz Zemes radās no zibens. No sākuma cilvēki baidījās no uguns, bet vēlāk sāka to izmantot.
Berze
Berzes ceļā var iegūt uguni. Pagātnē tas bija pirmais uguns iegūšanas paņēmiens.
Siltuma avotu iedalījums
Dabīgie siltuma avoti
Mākslīgie siltuma avoti
Dabīgie siltuma avoti
Dabīgie siltuma avoti- avoti, kas paši izstaro siltumu.
Tie ir:
Saule
Zibens
Jāņtārpiņš…

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