Different objects around us
The selection of a material to create an object depends on its characteristics and the intended use of the object. The question arises about what characteristics of materials are significant for their application. Some of these important characteristics of materials are:
Since water is considered as universal solvent, so solubility in water is taken as standard in most of the definitions; related to solubility.
Lighter materials like paper, leaves and wood float on the surface of water, while heavier objects, like those made from iron, sink in water.
Q1: What is the difference between soft and hard material?
Ans: Soft materials are those which can be compressed or scratched easily.
Q2: Why some materials lose their shine and appear dull?
Ans: Some materials often lose their shine and appear dull because of the action of air and moisture on them.
Q3: What types of substances are soluble in water? Give example.
Ans: Substances that completely disappear or dissolve in water are soluble in water. For example-salt, sugar etc.
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1. What are some common objects around us? |
2. How can we classify materials into groups? |
3. What are the properties of materials? |
4. Why is it important to sort materials into groups? |
5. What are some examples of materials that are transparent? |
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