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Our ncert solutions for Solutions 6. Physical and Chemical Changes - Chapter Review | Class 7 Science - Toppers Study is the best material for English Medium students cbse board and other state boards students.

 

Solutions ⇒ Class 7th ⇒ Science ⇒ 6. Physical and Chemical Changes

Solutions 6. Physical and Chemical Changes - Chapter Review | Class 7 Science - Toppers Study

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6. Physical and Chemical Changes

| Chapter Review |

Solutions 6. Physical and Chemical Changes - Chapter Review | Class 7 Science - Toppers Study


Chapter Review:


  • When any object or material transforms its colour, size and taste etc that is known as changes. Ex :- curd from milk, chapatti from Flour, chair from wood. 

  • There are two kinds of changes. (i) Physical changes (ii) Chemical changes.

  • A change in which a substance undergoes a change in its physical properties is called a physical change.

  • A change in which one or more new substances are formed is called a chemical change.

  • This process of depositing a layer of zinc
    on iron is called galvanisation.

  • Large crystals of pure substances can be formed from their solutions. The process is called crystallisation.

  • Oxygen and water (or water vapour) is essential for rusting. 

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Solutions ⇒ Class 7th ⇒ Science
1. Nutrition in Plants
2. Nutrition in Animals
3. Fibre to Fabric
4. Heat
5. Acids, Bases and Salts
6. Physical and Chemical Changes
7. Weather, Climate and Adaptations of Animals to Climate
8. Winds, Storms and Cyclones
9. Soil
10. Respiration in Organisms
11. Transportation in Animals and Plants
12. Reproduction in Plants
13. Motion and Time
14. Electric Current and its Effects
15. Light
16. Water : A Precious Resource
17. Forests: Our Lifeline
18. Wastewater Story

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