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प्रश्न
Write your observation and conclusion for the following:
When few marbles are put in a glass half-filled with water.
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उत्तर
Take some marbles and put them into the water of glass tumbler one by one. After some time you will notice that water level crosses the mark and rises. This is because the marbles occupy space. Again weigh the glass with the marbles. You will find that the second mass is greater than the first one. This proves that marbles have mass.
This proves that the matter has mass and occupies space.
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संबंधित प्रश्न
What are fluids ? Give two examples.
State whether the following statement is True or False:
Only water can exist in three different states
For the following statements, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions
Name the phenomenon which causes the Conversion of ice into water is
Select the correct alternative
The molecules ____________
What are fluids? Give two examples.
Write whether the following statement is true or false.
There is no difference between evaporation and boiling.
Write whether the following statement is true or false.
A gas has no free surface.
State the correct term from A, B, C, D, E or F in List II which represents the – change of state of matter or its relevant property from List I
| List I | List II |
| 1. Solid 'X' to a liquid 'Y' | A: Liquefaction |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Solidification |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting Point |
| F: Boiling point |
Give a reason for the following:
Globules of mercury kept in a petri dish, which is shaken slowly, come together forming a big globule.
