Kids Research Express

Aurora (phenomenon), luminous atmospheric phenomenon occurring most frequently above 60° North or South latitude, but also in other parts of...

Cloud, condensed form of atmospheric moisture consisting of small water droplets or tiny ice crystals . Clouds are the principal visible phe...

These are clouds composed of ice particles, found at average levels of 8 km (5 mi) or more above the earth. The family contains three princi...

These are clouds composed of water droplets and ranging in altitude from about 3 to 6 km (about 2 to 4 mi) above the earth. Two principal ge...

These clouds, also composed of water droplets, are generally less than 1.6 km (1 mi) high. Three principal forms comprise this group. Strato...