Sorting materials into
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This document discusses different properties that can be used to sort materials into groups, including appearance, hardness, solubility, and transparency. Appearance depends on whether a material has a lustre or not, hardness depends on how easily a material can be compressed or scratched, solubility depends on whether a material dissolves or remains intact in water, and transparency depends on whether light can pass through a material clearly, not clearly, or not at all. These properties can be used to categorize common materials like metals, paper, glass and determine if they are opaque, transparent, translucent, soft, hard, soluble or insoluble.
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Sorting materials into
- 1. SORTING MATERIALS INTO GROUPS Lata Sant B.Ed.(2014-2015)
- 2. Properties of materials 1. Appearance 2. Hardness 3. Soluble & Insoluble 4. Transparency a) Opaque b) Translucent
- 3. APPEARANCE • Materials that have lustre are usually metals examples- Iron, copper, aluminium, gold are examples of metals • Materials like paper, cardboard, wood etc. do not have lustre.
- 4. HARDNESS • Materials which can be compressed or scratched easily are called soft. Example- Iron • Materials which are difficult to compress are called hard. Example- cotton or sponge
- 5. SOLUBLE Some substances have completely disappeared or dissolved in water. Such substances are called soluble substances. INSOLUBLE Other substances do not mix with water and do not disappear even after we stir for a long time. These substances are insoluble in water.
- 6. TRANSPARENCY TRANSPARENT Those substances or materials through which things can be seen are called transparent. Example: Glass,water, air,some plastics OPAQUE There are some materials through which we are not able to see. These materials are called opaque. Example: wood, cardboard,metals. TRANSLUCENT The materials through which objects can be seen but not clearly are known as translucent. Example- Oil patch on paper.
- 7. ACKNOWLEDGEMENT • NCERT book of std 6. • www. GSEB.com