This application contains Physics and Chemistry lessons for 2nd graders, summaries of all lessons without the Internet.Excellent summary that helps you understand the lessons while memorizing them quickly.An application that works without the need for internet and eliminates a pile of papers.You can use this app anywhere without needing a booklet or anything.Complete summary of all 2nd year Physics and Chemistry lessons.Summary :1- Program• Constitution and transformation of matter• Movements and interactions• Waves and signals• Vision and image2- Encyclopedia• Definitions• Material sheetsThis is a Summarization for educational purposes, not a book so there is no copyright violation.