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प्रश्न
Give a geographical reason:
Air becomes saturated.
उत्तर
When the water evaporates from the earth, it is released into the air. The air has a maximum ability to hold moisture in a certain quantity and at a particular temperature only. When this ability is reached and relative humidity reaches 100%, the air is considered to have reached its saturation point.
In other words, when the proportion of water vapour and the vapour holding capacity is equal, the air is said to be saturated.
संबंधित प्रश्न
How does water kept in an earthen pot (matka) become cool during summer?
What is evaporation?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Explain why in hot summer days water remains cool in earthen pots.
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
Why is heat energy needed to melt a solid ? What is this heat energy called ?
What type of clothes should we wear in summer ? Why ?
Why does our palm feel cold when we put some acetone (or perfume) on it ?
The evaporation of water increases under the following conditions :
The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous physicist.
- Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
- Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as ?
- Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
- Name the most common substance belonging to state A.
- Which state of matter makes the sun and other stars to glow ?
