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प्रश्न
Give scientific reason.
Dew drops form on the grass in winter.
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उत्तर
In winter, the temperature drops at night, due to which the water vapour present in the air cools down and turns into water droplets through the process of condensation. When this cold air comes in contact with the surface of the grass, the water vapour condenses and collects on the grass in the form of dew droplets.
संबंधित प्रश्न
Match the following
| Column A | Column B |
| 1. mercury | 1. insulator |
| 2. wood | 2. water from 0°C to 4°C |
| 3. Aluminum | 3.absorbs |
| 4. contracts | 4.conductor |
| 5.black surface | 5. Thermometer |
Name the three modes of transfer of heat.
What will absorb heat?
Glass vessel
What will absorb heat?
Wooden spoon
What will absorb heat?
Soil
When an object is heated, the molecules that make up the object
Ice is kept in a double-walled container. Why?
The water in the black can becomes ______ than that in a white can after exposure to the sun.
On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?
The sum of the kinetic and potential energy is called the ______ of the molecules.
