الاختبارات
اختبار الفصل الأول: المعادن
36172%
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اختبار الفصل الثاني: الصخور النارية
33706%
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اختبار الفصل الثالث: الصخور الرسوبية و المتحولة
45750%
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اختبار الفصل الرابع: المياه الجوفية
6878%
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اختبار الفصل الخامس: الصفائح الأرضية
14269%
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اختبار الفصل السادس: البراكين
23667%
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اختبار الفصل السابع: الزلازل
13157%
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اختبار الفصل الثامن: الأحافير و السجل الصخري
9672%
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النقاشات