Page 1 - Lesson Notes

SAI INTERNATIONAL SCHOOL
CLASS- VI
SUBJECT- CHEMISTRY
TOPIC –SORTING MATERIALS INTO GROUPS
SUB-TOPIC- PROPERTIES OF MATERIALS

LESSON NOTES

PROPERTIES OF MATERIAL

Transparency:-

The property of a material to allow light to pass through it, is called transparency.

Different materials have transmitted different amout of light. On the basis of amount of
light that a material allow to enter through it, materials are classified into three groups.

Transparent Materials- Materials that allow to pass light throught them completely
,are called transparent materials.

E.g. air, water, glass etc.

Translucent Materials- Materials that allow a part of light through it (allow partially), are
called translucent materials.

E.g butter paper,thin coloured polythene, ice, frosted glass etc.

Opaque Materials-Materials that do not allow any light to pass through it, are called
opaque materials,

As for examples wood, stone, metal sheet etc

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