Imagine that you could dive deep into the Atlantic Ocean where the South American Plate and African Plate meet at a plate boundary.
Make a prediction: What do you think you would see at the plate boundary? Would you see the mantle? Why or why not?

If I would dive at the edge of American Plate and African Plate, I would be able to see the Mid-Atlantic-Ridge. Mid-Atlantic-Ridge is an undewater mountain range in the atlantic ocean. Here, the sea floor is spreading at a rate of 2.5 cm/year in an east-west direction, i.e. divergent plate boundary. If I could dive, I would expect several volcanic islands that run the length of the Atlantic Ocean. Therefore, I would also be able see the mantle for active volcanic processes.

PS: The formation of Iceland is believed to be a product of Mid-Atlantic-Ridge.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.