Test: A Journey through States of Water - Class 6 MCQ

When water is sprinkled on a hot surface, it heats up and turns into steam (water vapor) due to evaporation.

Evaporation is the process where liquid water changes into water vapour (gas). This happens when water gets heated, like when clothes dry in the sun or when water in a pan turns into steam.

Water vapour is the gaseous form of water, and it is invisible. While it’s present in the air around us, we can’t see it unless it condenses into tiny droplets, forming steam or clouds​.

During condensation, water vapour (gas) loses heat and changes back into liquid water. This is why we see water droplets on the outside of a cold glass or in the formation of clouds​.

When air moves faster, it helps to carry away the humid air above the surface, allowing more water to evaporate quickly. This is why clothes dry faster on a windy day.

The cold surface of the bottle causes water vapor in the air to lose energy and condense into liquid droplets.

Condensation converts water vapor back into liquid droplets, forming clouds which eventually lead to rain.

The fan accelerates the evaporation of sweat from the skin, removing heat and making us feel cooler.

On a windy day, the moving air helps to carry away the moisture (water vapour) from the clothes, allowing more water to evaporate quickly. This makes clothes dry faster compared to when there is no wind​.

An AWG machine collects moisture from humid air by cooling it, causing water vapor to condense into liquid water.