Frozen dew is called hail stone.

Explanation:
Dew is formed when water vapor condenses onto cool surfaces, such as grass or leaves, during the night. It occurs when the temperature of the surface is lower than the dew point temperature. Dew is composed of water droplets that form from the water vapor in the air.

When the temperature drops even further, the dew droplets can freeze and form ice crystals. This frozen dew is called hail stone. Hail stones are small, hard pellets of ice that fall from the sky during thunderstorms. They are typically round or irregularly shaped and can vary in size from pea-sized to golf ball-sized or even larger.

Key Points:
- Dew is formed when water vapor condenses onto cool surfaces.
- Dew is composed of water droplets.
- When the temperature drops further, the dew droplets can freeze.
- Frozen dew is called hail stone.
- Hail stones are small, hard pellets of ice.
- Hail stones can vary in size.

Example:
Imagine a cold winter morning when the grass and trees are covered in a thin layer of frost. This frost is formed from frozen dew, which has turned into ice crystals due to the low temperature. If you were to touch the frost, it would feel cold and hard, similar to tiny pieces of ice. This is an example of how frozen dew can transform into hail stone in certain weather conditions.

Conclusion:
In conclusion, frozen dew is called hail stone. It is formed when dew droplets freeze and turn into small, hard pellets of ice. Hail stones can vary in size and are commonly seen during thunderstorms.

When dew drops freeze they convert into hail stones