Class 4 science
The document discusses the properties of different materials. It defines hard materials as those that cannot be easily compressed, cut, bent or scratched, with examples being brick, bone and steel. Soft materials are defined as those that can be easily compressed, cut, bent or scratched, with examples being foam and clay. Shiny materials are those that reflect light well, such as gold and diamonds, while dull materials do not reflect light well, like candles and paper. Rough materials have an uneven surface with ups and downs, exemplified by bricks and rocks, whereas smooth materials have no ups and downs on their surface, like mirrors and tiles. The document ends with an assignment to identify the odd one out in three pairs of materials based on these
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Class 4 science
- 1. CLASS 4 SUBJECT: SCIENCE TOPIC: MATTER AND MATERIALS SUB. TOPIC: PROPERTIES OF MATERIALS PART 12
- 6. SPOON
- 7. CHAIR
- 8. CANDLE
- 9. NOTEBOOK
- 10. PROPERTIES OF MATERIAL 1.Hard and soft 2.Shiny and dull 3.Rough and smooth 4.Flexible and rigid 5.Waterproof
- 11. IRON ROD
- 12. HARD MATERIALS • Materials which cannot be easily compressed, cut, bent or scratched are called hard materials. Example: Brick Bone Steel
- 13. CLAY
- 14. PRESSING OF CLAY
- 15. SOFT MATERIALS • Materials which can be easily compressed, cut, bent or scratched are called soft materials. Examples: Foam Clay Skin
- 16. WALKING ON THE ROAD
- 17. GOLD
- 18. SHINING OF GOLD
- 19. REFLECTION The bouncing of light by any smooth or polished surface is called reflection.
- 20. SHINY MATERIAL • Materials which reflect the light well are called shiny materials. Examples: Stainless steel Gold Diamond.
- 21. DULL MATERIALS • Material which do not reflect the light well are called dull materials Examples: Candle Paper Jute bag
- 23. Tyre
- 24. MIRROR
- 27. ROUGH MATERIAL • Materials which have ups and downs on their surface are called rough materials. Examples Brick Rock Tyre.
- 28. SMOOTH MATERIALS • Materials which do not have ups and downs on their surface are called smooth materials. Examples: Mirror Silk cloth Tiles
- 29. •Hard- soft •Shiny- dull •Rough- smooth
- 30. ASSIGNMENT Find the odd one. 1.Brick, bone, clay, iron rod 2.Stainless steel, candle, gold, diamond. 3.Tyre, mirror, silk cloth, tiles.