Using the left mouse button, select piece and drag into position. Pressing the right mouse button rotates piece. If you need a hint, press the "V" key to view the whole image. Change the number of pieces: 9 | 24 | 48 | 160.
Altocumulus clouds at sunset. Clouds are typically identified based upon your observation point. "Alto" is the prefix given to mid-level clouds, those between 6,000 and 20,000 feet (1,800 to 6,000 meters). They are composed primarily of water droplets, however, they can also be composed of ice crystals when temperatures are low enough. To learn more about clouds go to JetStream - an Online School for Weather.