Lesson 8 & 9 - Chapter 1 - (Solutions - Envir. balance) - Integrated Science 1st Secondary

45:05
Lessons 3 & 4 - Chapter 3 - (Acidic Rain and Measurements) - Integrated Science 1st Secondary

41:14
1st Secondary Integrated Science Chapter 1 Lesson 8 and 9 علوم متكاملة لغات الدرس الثامن والتاسع

12:00
Introduction of Pteridophyte

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Chapter 2 - Lesson 1 (Non-Renewable Energy) - Integrated Science 2nd term

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علوم متكاملة الدرس التاسع | التوازن البيئي ودور الانسان في استدامة الحياة المائية

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Lesson 7 - Chapter 1 - (Water Pressure) - Integrated Science 1st Secondary

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Integrated Science Sec.1| Lesson Eight Chapter One ( Aquatic ecosystem ) | العلوم المتكامله لغات

43:47