Fast Facts: Clouds

1.       Clouds form when warmair rises.

2.       High in the sky, invisible water vapour in the warm air cools and turns into water droplets.

3.       High-level clouds float at 12,000 m (40,000 ft) ,while clouds that touch the ground create fog and mist.

4.       An average cloud weights as much as a jumbo jet, but luckily this weight is spread out over a large area!