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ID number:351243
Author:
Evaluation:
Published: 27.08.2018.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Kur dabā sastopamas izejvielas?
Latvijā sastopamās izejvielas - smiltis,kaļķakmens,dolomīts,ģipšakmens,māli pieder pie neorganiskajām izejvielām. No šīm izejvielām ražo stiklu,cementu,ģipsi,betonu,ķieģeļus,keramiskos izstrādājumus un citus būvmateriālus.

Kas ir blakusprodukts?
Savienojoties izejvielai ar enerģiju rodas tehnoloģisks process,kas ir fizikālu un ķīmisku paņēmienu kopums vielu vai materiālu īpašību pārveidošanai. Rezultātā rodas produkti,blakusprodukti un atkritumi.

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