Exploring:, looking for places where copper can be found in the ground., extracting, removing the copper ore (rock with copper) from the earth., crushing, breaking the rock into very small pieces or powder., concentrating, separating the valuable copper from the waste rock., smelting, heating the copper at very high temperatures to remove impurities., refining, cleaning the copper further to make it very pure and ready to us

بواسطة

النمط البصري

إظهار الكل

إعدادات النشاط

لوحة الصدارة

تبديل القالب

استعادة الحفظ التلقائي: ؟