Extreme Weather THUNDERSTORMS DiscoverRoo An Imprint of Pop popbooksonline.com Martha London
4 CHAPTER 1 HOW THUNDERSTORMS FORM A thunderstorm happens when clouds make rain and lightning A thunderstorm needs warm moist air to form This warm air rises and meets cold air above The warm air cools WATCH A VIDEO HERE
5 Thunderstorm clouds can be as high as the tallest mountain on Earth Then it condenses into drops of water These drops stick to tiny bits of dust in the air Together they form a cloud
