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

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.