List the initial substances and the final products.
A core rule taught in these papers—the total mass remains constant before and after a transformation.
The (Matter and its transformations) integration situation for the 2nd year of middle school (2AM) in Algeria is a key educational resource. While "lazib" likely refers to the specialized educational platform Lazib.com , direct PDF download links are typically accessed through their specific course categories.
You can find and download these educational papers on the Lazib.com Physical Sciences section or via reputable Algerian educational portals like Education-DZ or Encyclo-Education. Key Concepts in the "Matter and its Transformations" Paper:
Usually a story-based problem (e.g., a kitchen accident or a laboratory observation).
Changes that result in new substances with different properties (e.g., combustion of paper, iron rusting, fermentation).
These integration situations typically test a student's ability to distinguish between physical and chemical changes through real-world scenarios:
Explain why a change is physical or chemical based on the "reversibility" or "appearance of new substances" criteria.