Sky questions This is a list of recently added questions about sky. What cloud is it?Cumulus clouds are clouds which have flat bases and are often described as "puffy", "cotton-like" or "fluffy" in appearance. Cumulus clouds can be formed from water vapor, supercooled water droplets, or ice crystals, depending upon the ambient temperature. They come in many distinct subforms, and generally cool the earth by reflecting the incoming solar radiation. Created by: Tschuka hard 44% cumulonimbuscumulonimbus684cirruscirrus1466cumuluscumulus2209stratusstratus639clouds riddles » What cloud is it?Cumulonimbus, from the Latin cumulus ("storm cloud"), is a dense, towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents. If observed during a storm, these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along cold front squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes. Created by: Tschuka hard 45% stratusstratus435cumuluscumulus2069cumulonimbuscumulonimbus2539cirrostratuscirrostratus487weather riddles » This is a rare phenomenon called iridescent clouds. It occurs in the clouds with ...Small droplets or ice crystals. The effect is similar to irisation. Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light. Larger ice crystals do not produce iridescence, but can cause halos, a different phenomenon.Created by: Tschuka average 60% volcanic dustsvolcanic dusts2558sulphuric acidsulphuric acid2820detergent vaporsdetergent vapors2003small droplets or ice crystalssmall droplets or ice crystals11352atmosphere riddles » What is larger on the sky: the Moon or the Sun? (by apparent size)Sometimes the Moon, sometimes the Sun. The Moon's orbit is elliptical, and its apparent diameter varies by 10%. This is why both total eclipses (if the Moon is larger) and annular eclipses (if the Sun is larger) happen.Created by: pan Krzyżówkahard 43% the Sunthe Sun2131the Moonthe Moon2668both are identicalboth are identical1712sometimes the Moon, sometimes the Sunsometimes the Moon, sometimes the Sun4975Sun riddles » Which direction was the camera pointing at while taking this picture?North. The entire celestial sphere seems to rotate slowly around the North-South axis of Earth's rotation. So the camera must have been pointed North or South, depending on the hemisphere the photo was taken at. But the bright star in the center must be Polaris, as the south celestial pole currently lacks a bright star to mark its position. Created by: globalquiz.orgaverage 64% NorthNorth10674SouthSouth2261EastEast1931WestWest1715photography riddles » Play nature quiz and see all the questions.