This book is an essential aid for the sixth-grade student, as it aligns with the modern approach to teaching Natural Sciences. It is organized into chapters and follows the lessons of the school textbook, fully covering its material. 

Each lesson includes:

• Presentation of the theory in brief 
• Detailed presentation of the theory with questions and answers 
• Detailed answers to all the questions and exercises in the school textbook (observations, experiment conclusions, assignments) 
• Additional exercises that help reinforce new knowledge 
• Assessment criteria 

Each chapter concludes with a review assessment criterion that contributes to the student's proper preparation for the school exam. At the end of the book, answers to all additional exercises and assessment criteria are provided.