· Define the following terms:
Classification
Lustre
Solubility
Transparent
Opaque
Translucent
Good conductor of heat
Bad conductor of heat
Combustibility
Answers
Answer:
Sorting Materials into Groups
All things are made of one or more materials.
Same things can be made from different types of materials.
It may be man-made or naturally occurring.
Materials occupy space.
Materials have mass.
Materials can be classified on the basis of many criteria.
Materials can be classified on the basis of physical state; as solid, liquid and gas.
Solid Liquid & Gas
solid liquid and gas
Fig:States of Matter
Solid: Solid has definite shape and definite volume. Examples: Stones, wood, plastic, common salt, steel, ice, glass, etc.
Liquid: Liquid has indefinite shape but definite volume. Examples: Water, milk, oil, etc.
Gas: Gas has indefinite shape and indefinite volume. Examples: Oxygen, nitrogen, carbon dioxide, etc.
Other Criteria For Sorting Materials:
Appearance: Different materials look different from each other. The appearance depends on colour, hardness, texture, and lustre.
Hardness: hardness is another property of materials. Some materials are very hard while some are very soft.
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Answer:
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