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प्रश्न
Give two examples for each type of matter
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उत्तर
- Natural matter: It occurs in nature and can be used to make more useful substances, e.g., wood, coal, silk, water, stone, cotton, jute, cereals, fruits, etc.
- Man-made matter : It is produce artificially from natural matter, e.g., plastics, soaps, detergents, medicines, glass, nylon, steel, ceramic, etc.
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संबंधित प्रश्न
.............. process is just reverse of melting.
Discuss the three states of matter solid, liquids and gas on the basis of molecular model.
Why do solids, liquids, and gases differ in their physical states?
Give a reason for the Pure substances have fixed melting or boiling points.
Fill in the blank
Water is a matter because it has ............ and occupies ............
Fill in the blank
......... can flow.
Write whether the following statement is true or false.
Only water can exist in three different states.
Name the phenomenon which cause the following change.
Conversion of ice into water.
Select natural and man-made matter from the following list:
Wood, plastic, silk, medicines, detergents, coal, water, ceramic, cotton, glass, nylon, fruits.
Match the following
| Column A | Column B | ||
| a | Solids | 1 | Can flow in all directions |
| b | Sublimination | 2 | The temperature at which a liquid changes into its gaseous state |
| c | Boiling Point | 3 | Can have any number of free surfaces |
| d | Gases | 4 | Gaps between particles |
| e | Intermolecular space | 5 | Change of state from solid to gas |
