الاختبارات
اختبار الفصل الأول: المعادن
35916%
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اختبار الفصل الثاني: الصخور النارية
33506%
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اختبار الفصل الثالث: الصخور الرسوبية و المتحولة
44550%
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اختبار الفصل الرابع: المياه الجوفية
6789%
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اختبار الفصل الخامس: الصفائح الأرضية
13985%
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اختبار الفصل السادس: البراكين
23517%
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اختبار الفصل السابع: الزلازل
13121%
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اختبار الفصل الثامن: الأحافير و السجل الصخري
9261%
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النقاشات